312999553 has 4 divisors (see below), whose sum is σ = 313533360. Its totient is φ = 312465748.

The previous prime is 312999551. The next prime is 312999587. The reversal of 312999553 is 355999213.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 312999553 - 2¹ = 312999551 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (312999551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 266023 + ... + 267196.

It is an arithmetic number, because the mean of its divisors is an integer number (78383340).

Almost surely, 2^312999553 is an apocalyptic number.

It is an amenable number.

312999553 is a deficient number, since it is larger than the sum of its proper divisors (533807).

312999553 is an equidigital number, since it uses as much as digits as its factorization.

312999553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533806.

The product of its digits is 328050, while the sum is 46.

The square root of 312999553 is about 17691.7933799827. The cubic root of 312999553 is about 678.9658104297.

The spelling of 312999553 in words is "three hundred twelve million, nine hundred ninety-nine thousand, five hundred fifty-three".