1977326743 has 12 divisors (see below), whose sum is σ = 2306881200. Its totient is φ = 1694851494.

The previous prime is 1977326699. The next prime is 1977326753. The reversal of 1977326743 is 3476237791.

It is a perfect power (a 11-th power), and thus also a powerful number.

It is a de Polignac number, because none of the positive numbers 2^k-1977326743 is a prime.

It is a super-3 number, since 3×1977326743³ (a number of 29 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

Its product of digits (1333584) is a multiple of the sum of its prime divisors (7).

It is a nialpdrome in base 7.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1977326753) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 282475246 + ... + 282475252.

It is an arithmetic number, because the mean of its divisors is an integer number (192240100).

Almost surely, 2^1977326743 is an apocalyptic number.

1977326743 is a deficient number, since it is larger than the sum of its proper divisors (329554457).

1977326743 is an frugal number, since it uses more digits than its factorization.

1977326743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77 (or 7 counting only the distinct ones).

The product of its digits is 1333584, while the sum is 49.

The square root of 1977326743 is about 44467.1422850626. The cubic root of 1977326743 is about 1255.1418585379.

Multiplying 1977326743 by its sum of digits (49), we get a 13-th power (96889010407 = 7¹³).

1977326743 divided by its sum of digits (49) gives a 9-th power (40353607 = 7⁹).

The spelling of 1977326743 in words is "one billion, nine hundred seventy-seven million, three hundred twenty-six thousand, seven hundred forty-three".