312120497 has 4 divisors (see below), whose sum is σ = 336129780. Its totient is φ = 288111216.

The previous prime is 312120451. The next prime is 312120499. The reversal of 312120497 is 794021213.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 175324081 + 136796416 = 13241^2 + 11696^2 .

It is a cyclic number.

It is not a de Polignac number, because 312120497 - 2⁶ = 312120433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (312120499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12004622 + ... + 12004647.

It is an arithmetic number, because the mean of its divisors is an integer number (84032445).

Almost surely, 2^312120497 is an apocalyptic number.

It is an amenable number.

312120497 is a deficient number, since it is larger than the sum of its proper divisors (24009283).

312120497 is a wasteful number, since it uses less digits than its factorization.

312120497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24009282.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 312120497 is about 17666.9323030344. The cubic root of 312120497 is about 678.3295916394.

The spelling of 312120497 in words is "three hundred twelve million, one hundred twenty thousand, four hundred ninety-seven".