431020087 has 2 divisors, whose sum is σ = 431020088. Its totient is φ = 431020086.

The previous prime is 431020027. The next prime is 431020123. The reversal of 431020087 is 780020134.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-431020087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (431020027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215510043 + 215510044.

It is an arithmetic number, because the mean of its divisors is an integer number (215510044).

Almost surely, 2^431020087 is an apocalyptic number.

431020087 is a deficient number, since it is larger than the sum of its proper divisors (1).

431020087 is an equidigital number, since it uses as much as digits as its factorization.

431020087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 431020087 is about 20761.0232647623. The cubic root of 431020087 is about 755.3806171166.

The spelling of 431020087 in words is "four hundred thirty-one million, twenty thousand, eighty-seven".