51928997 has 2 divisors, whose sum is σ = 51928998. Its totient is φ = 51928996.

The previous prime is 51928973. The next prime is 51929011. The reversal of 51928997 is 79982915.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38613796 + 13315201 = 6214^2 + 3649^2 .

It is a cyclic number.

It is not a de Polignac number, because 51928997 - 2¹⁰ = 51927973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51928927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25964498 + 25964499.

It is an arithmetic number, because the mean of its divisors is an integer number (25964499).

Almost surely, 2^51928997 is an apocalyptic number.

It is an amenable number.

51928997 is a deficient number, since it is larger than the sum of its proper divisors (1).

51928997 is an equidigital number, since it uses as much as digits as its factorization.

51928997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 408240, while the sum is 50.

The square root of 51928997 is about 7206.1776969486. The cubic root of 51928997 is about 373.0811540124.

It can be divided in two parts, 51928 and 997, that added together give a palindrome (52925).

The spelling of 51928997 in words is "fifty-one million, nine hundred twenty-eight thousand, nine hundred ninety-seven".