314431991 has 2 divisors, whose sum is σ = 314431992. Its totient is φ = 314431990.

The previous prime is 314431861. The next prime is 314432009. The reversal of 314431991 is 199134413.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 314431991 - 2¹⁰ = 314430967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (314431391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157215995 + 157215996.

It is an arithmetic number, because the mean of its divisors is an integer number (157215996).

Almost surely, 2^314431991 is an apocalyptic number.

314431991 is a deficient number, since it is larger than the sum of its proper divisors (1).

314431991 is an equidigital number, since it uses as much as digits as its factorization.

314431991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11664, while the sum is 35.

The square root of 314431991 is about 17732.2302883760. The cubic root of 314431991 is about 679.9999935121. Note that the first 5 decimals are identical.

The spelling of 314431991 in words is "three hundred fourteen million, four hundred thirty-one thousand, nine hundred ninety-one".