312098987 has 2 divisors, whose sum is σ = 312098988. Its totient is φ = 312098986.

The previous prime is 312098977. The next prime is 312098993. The reversal of 312098987 is 789890213.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 312098987 - 2¹⁶ = 312033451 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (312098977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156049493 + 156049494.

It is an arithmetic number, because the mean of its divisors is an integer number (156049494).

Almost surely, 2^312098987 is an apocalyptic number.

312098987 is a deficient number, since it is larger than the sum of its proper divisors (1).

312098987 is an equidigital number, since it uses as much as digits as its factorization.

312098987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 47.

The square root of 312098987 is about 17666.3235281142. The cubic root of 312098987 is about 678.3140087637.

The spelling of 312098987 in words is "three hundred twelve million, ninety-eight thousand, nine hundred eighty-seven".