431012987 has 2 divisors, whose sum is σ = 431012988. Its totient is φ = 431012986.

The previous prime is 431012927. The next prime is 431012999. The reversal of 431012987 is 789210134.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 431012987 - 2⁸ = 431012731 is a prime.

It is a Chen prime.

431012987 is a modest number, since divided by 12987 gives 431 as remainder.

It is not a weakly prime, because it can be changed into another prime (431012927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215506493 + 215506494.

It is an arithmetic number, because the mean of its divisors is an integer number (215506494).

Almost surely, 2^431012987 is an apocalyptic number.

431012987 is a deficient number, since it is larger than the sum of its proper divisors (1).

431012987 is an equidigital number, since it uses as much as digits as its factorization.

431012987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 431012987 is about 20760.8522705596. The cubic root of 431012987 is about 755.3764694121.

The spelling of 431012987 in words is "four hundred thirty-one million, twelve thousand, nine hundred eighty-seven".