51492737 has 2 divisors, whose sum is σ = 51492738. Its totient is φ = 51492736.

The previous prime is 51492731. The next prime is 51492739. The reversal of 51492737 is 73729415.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49056016 + 2436721 = 7004^2 + 1561^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51492737 is a prime.

Together with 51492739, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51492737.

It is not a weakly prime, because it can be changed into another prime (51492731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25746368 + 25746369.

It is an arithmetic number, because the mean of its divisors is an integer number (25746369).

Almost surely, 2^51492737 is an apocalyptic number.

It is an amenable number.

51492737 is a deficient number, since it is larger than the sum of its proper divisors (1).

51492737 is an equidigital number, since it uses as much as digits as its factorization.

51492737 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52920, while the sum is 38.

The square root of 51492737 is about 7175.8439921726. The cubic root of 51492737 is about 372.0334522081.

The spelling of 51492737 in words is "fifty-one million, four hundred ninety-two thousand, seven hundred thirty-seven".