315549887 has 2 divisors, whose sum is σ = 315549888. Its totient is φ = 315549886.

The previous prime is 315549859. The next prime is 315549893. The reversal of 315549887 is 788945513.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 315549887 - 2¹⁸ = 315287743 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (315549847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157774943 + 157774944.

It is an arithmetic number, because the mean of its divisors is an integer number (157774944).

Almost surely, 2^315549887 is an apocalyptic number.

315549887 is a deficient number, since it is larger than the sum of its proper divisors (1).

315549887 is an equidigital number, since it uses as much as digits as its factorization.

315549887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1209600, while the sum is 50.

The square root of 315549887 is about 17763.7239057580. The cubic root of 315549887 is about 680.8049054340.

The spelling of 315549887 in words is "three hundred fifteen million, five hundred forty-nine thousand, eight hundred eighty-seven".