813253761 has 12 divisors (see below), whose sum is σ = 1181736192. Its totient is φ = 538921656.

The previous prime is 813253759. The next prime is 813253801. The reversal of 813253761 is 167352318.

It is not a de Polignac number, because 813253761 - 2¹ = 813253759 is a prime.

It is a super-2 number, since 2×813253761² = 1322763359561290242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (813253741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 269041 + ... + 272046.

It is an arithmetic number, because the mean of its divisors is an integer number (98478016).

Almost surely, 2^813253761 is an apocalyptic number.

It is an amenable number.

813253761 is a deficient number, since it is larger than the sum of its proper divisors (368482431).

813253761 is a wasteful number, since it uses less digits than its factorization.

813253761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541260 (or 541257 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 813253761 is about 28517.6044049987. The cubic root of 813253761 is about 933.4162560537.

The spelling of 813253761 in words is "eight hundred thirteen million, two hundred fifty-three thousand, seven hundred sixty-one".