813149875 has 8 divisors (see below), whose sum is σ = 1014811200. Its totient is φ = 650519800.

The previous prime is 813149849. The next prime is 813149927. The reversal of 813149875 is 578941318.

It is a happy number.

It is not a de Polignac number, because 813149875 - 2¹³ = 813141683 is a prime.

It is a super-2 number, since 2×813149875² = 1322425438425031250, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3252475 + ... + 3252724.

It is an arithmetic number, because the mean of its divisors is an integer number (126851400).

Almost surely, 2^813149875 is an apocalyptic number.

813149875 is a deficient number, since it is larger than the sum of its proper divisors (201661325).

813149875 is an equidigital number, since it uses as much as digits as its factorization.

813149875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6505214 (or 6505204 counting only the distinct ones).

The product of its digits is 241920, while the sum is 46.

The square root of 813149875 is about 28515.7829105217. The cubic root of 813149875 is about 933.3765091279.

The spelling of 813149875 in words is "eight hundred thirteen million, one hundred forty-nine thousand, eight hundred seventy-five".