996637501 has 2 divisors, whose sum is σ = 996637502. Its totient is φ = 996637500.

The previous prime is 996637489. The next prime is 996637511. The reversal of 996637501 is 105736699.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 923552100 + 73085401 = 30390^2 + 8549^2 .

It is a cyclic number.

It is not a de Polignac number, because 996637501 - 2²³ = 988248893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (996637511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498318750 + 498318751.

It is an arithmetic number, because the mean of its divisors is an integer number (498318751).

Almost surely, 2^996637501 is an apocalyptic number.

It is an amenable number.

996637501 is a deficient number, since it is larger than the sum of its proper divisors (1).

996637501 is an equidigital number, since it uses as much as digits as its factorization.

996637501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 306180, while the sum is 46.

The square root of 996637501 is about 31569.5660565678. The cubic root of 996637501 is about 998.8779083813.

The spelling of 996637501 in words is "nine hundred ninety-six million, six hundred thirty-seven thousand, five hundred one".