996401257 has 2 divisors, whose sum is σ = 996401258. Its totient is φ = 996401256.

The previous prime is 996401209. The next prime is 996401279. The reversal of 996401257 is 752104699.

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., 625800256 + 370601001 = 25016^2 + 19251^2 .

It is an emirp because it is prime and its reverse (752104699) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-996401257 is a prime.

It is a super-3 number, since 3×996401257³ (a number of 28 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (996401657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498200628 + 498200629.

It is an arithmetic number, because the mean of its divisors is an integer number (498200629).

Almost surely, 2^996401257 is an apocalyptic number.

It is an amenable number.

996401257 is a deficient number, since it is larger than the sum of its proper divisors (1).

996401257 is an equidigital number, since it uses as much as digits as its factorization.

996401257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 996401257 is about 31565.8241932632. The cubic root of 996401257 is about 998.7989771215.

The spelling of 996401257 in words is "nine hundred ninety-six million, four hundred one thousand, two hundred fifty-seven".