312161477 has 2 divisors, whose sum is σ = 312161478. Its totient is φ = 312161476.

The previous prime is 312161471. The next prime is 312161491. The reversal of 312161477 is 774161213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 236975236 + 75186241 = 15394^2 + 8671^2 .

It is a cyclic number.

It is not a de Polignac number, because 312161477 - 2¹⁸ = 311899333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312161471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156080738 + 156080739.

It is an arithmetic number, because the mean of its divisors is an integer number (156080739).

Almost surely, 2^312161477 is an apocalyptic number.

It is an amenable number.

312161477 is a deficient number, since it is larger than the sum of its proper divisors (1).

312161477 is an equidigital number, since it uses as much as digits as its factorization.

312161477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7056, while the sum is 32.

The square root of 312161477 is about 17668.0920588500. The cubic root of 312161477 is about 678.3592775357.

The spelling of 312161477 in words is "three hundred twelve million, one hundred sixty-one thousand, four hundred seventy-seven".