51977683 has 4 divisors (see below), whose sum is σ = 52958448. Its totient is φ = 50996920.

The previous prime is 51977659. The next prime is 51977693. The reversal of 51977683 is 38677915.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 38677915 = 5 ⋅7735583.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51977683 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51977693) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 490303 + ... + 490408.

It is an arithmetic number, because the mean of its divisors is an integer number (13239612).

Almost surely, 2^51977683 is an apocalyptic number.

51977683 is a gapful number since it is divisible by the number (53) formed by its first and last digit.

51977683 is a deficient number, since it is larger than the sum of its proper divisors (980765).

51977683 is an equidigital number, since it uses as much as digits as its factorization.

51977683 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 980764.

The product of its digits is 317520, while the sum is 46.

The square root of 51977683 is about 7209.5549793312. The cubic root of 51977683 is about 373.1977115979.

It can be divided in two parts, 5197 and 7683, that added together give a triangular number (12880 = T₁₆₀).

The spelling of 51977683 in words is "fifty-one million, nine hundred seventy-seven thousand, six hundred eighty-three".