201790931 has 2 divisors, whose sum is σ = 201790932. Its totient is φ = 201790930.

The previous prime is 201790921. The next prime is 201790951. The reversal of 201790931 is 139097102.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201790931 is a prime.

It is a super-2 number, since 2×201790931² = 81439159667693522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (201790921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100895465 + 100895466.

It is an arithmetic number, because the mean of its divisors is an integer number (100895466).

Almost surely, 2^201790931 is an apocalyptic number.

201790931 is a deficient number, since it is larger than the sum of its proper divisors (1).

201790931 is an equidigital number, since it uses as much as digits as its factorization.

201790931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3402, while the sum is 32.

The square root of 201790931 is about 14205.3134777097. The cubic root of 201790931 is about 586.5439344168.

The spelling of 201790931 in words is "two hundred one million, seven hundred ninety thousand, nine hundred thirty-one".