1976513764 has 9 divisors (see below), whose sum is σ = 3459054697. Its totient is φ = 988212424.

The previous prime is 1976513761. The next prime is 1976513771. The reversal of 1976513764 is 4673156791.

The square root of 1976513764 is 44458.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 535552164 + 1440961600 = 23142^2 + 37960^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1976513761) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 77802 + ... + 100030.

Almost surely, 2^1976513764 is an apocalyptic number.

1976513764 is the 44458-th square number.

It is an amenable number.

1976513764 is a deficient number, since it is larger than the sum of its proper divisors (1482540933).

1976513764 is an frugal number, since it uses more digits than its factorization.

1976513764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44462 (or 22231 counting only the distinct ones).

The product of its digits is 952560, while the sum is 49.

The cubic root of 1976513764 is about 1254.9698175310.

Multiplying 1976513764 by its sum of digits (49), we get a square (96849174436 = 311206²).

The spelling of 1976513764 in words is "one billion, nine hundred seventy-six million, five hundred thirteen thousand, seven hundred sixty-four".