431016491 has 2 divisors, whose sum is σ = 431016492. Its totient is φ = 431016490.

The previous prime is 431016457. The next prime is 431016517. The reversal of 431016491 is 194610134.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-431016491 is a prime.

It is not a weakly prime, because it can be changed into another prime (431016431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215508245 + 215508246.

It is an arithmetic number, because the mean of its divisors is an integer number (215508246).

Almost surely, 2^431016491 is an apocalyptic number.

431016491 is a deficient number, since it is larger than the sum of its proper divisors (1).

431016491 is an equidigital number, since it uses as much as digits as its factorization.

431016491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 431016491 is about 20760.9366599872. The cubic root of 431016491 is about 755.3785163976.

The spelling of 431016491 in words is "four hundred thirty-one million, sixteen thousand, four hundred ninety-one".