190631971 has 2 divisors, whose sum is σ = 190631972. Its totient is φ = 190631970.

The previous prime is 190631963. The next prime is 190631983. The reversal of 190631971 is 179136091.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 190631971 - 2³ = 190631963 is a prime.

It is a super-3 number, since 3×190631971³ (a number of 26 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 190631971.

It is not a weakly prime, because it can be changed into another prime (190631071) 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, 95315985 + 95315986.

It is an arithmetic number, because the mean of its divisors is an integer number (95315986).

Almost surely, 2^190631971 is an apocalyptic number.

190631971 is a deficient number, since it is larger than the sum of its proper divisors (1).

190631971 is an equidigital number, since it uses as much as digits as its factorization.

190631971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10206, while the sum is 37.

The square root of 190631971 is about 13806.9537190504. The cubic root of 190631971 is about 575.5263948293.

The spelling of 190631971 in words is "one hundred ninety million, six hundred thirty-one thousand, nine hundred seventy-one".