51629797 has 2 divisors, whose sum is σ = 51629798. Its totient is φ = 51629796.

The previous prime is 51629759. The next prime is 51629807. The reversal of 51629797 is 79792615.

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., 36372961 + 15256836 = 6031^2 + 3906^2 .

It is a cyclic number.

It is not a de Polignac number, because 51629797 - 2¹¹ = 51627749 is a prime.

It is a super-2 number, since 2×51629797² = 5331271876522418, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51621797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25814898 + 25814899.

It is an arithmetic number, because the mean of its divisors is an integer number (25814899).

Almost surely, 2^51629797 is an apocalyptic number.

It is an amenable number.

51629797 is a deficient number, since it is larger than the sum of its proper divisors (1).

51629797 is an equidigital number, since it uses as much as digits as its factorization.

51629797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 238140, while the sum is 46.

The square root of 51629797 is about 7185.3877417993. The cubic root of 51629797 is about 372.3632445458.

The spelling of 51629797 in words is "fifty-one million, six hundred twenty-nine thousand, seven hundred ninety-seven".