190731097 has 2 divisors, whose sum is σ = 190731098. Its totient is φ = 190731096.

The previous prime is 190731091. The next prime is 190731113. The reversal of 190731097 is 790137091.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 187717401 + 3013696 = 13701^2 + 1736^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-190731097 is a prime.

It is not a weakly prime, because it can be changed into another prime (190731091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95365548 + 95365549.

It is an arithmetic number, because the mean of its divisors is an integer number (95365549).

Almost surely, 2^190731097 is an apocalyptic number.

It is an amenable number.

190731097 is a deficient number, since it is larger than the sum of its proper divisors (1).

190731097 is an equidigital number, since it uses as much as digits as its factorization.

190731097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11907, while the sum is 37.

The square root of 190731097 is about 13810.5429654304. The cubic root of 190731097 is about 575.6261328107.

The spelling of 190731097 in words is "one hundred ninety million, seven hundred thirty-one thousand, ninety-seven".