190806157 has 2 divisors, whose sum is σ = 190806158. Its totient is φ = 190806156.

The previous prime is 190806107. The next prime is 190806163. The reversal of 190806157 is 751608091.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 176863401 + 13942756 = 13299^2 + 3734^2 .

It is a cyclic number.

It is not a de Polignac number, because 190806157 - 2⁷ = 190806029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (190806107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95403078 + 95403079.

It is an arithmetic number, because the mean of its divisors is an integer number (95403079).

Almost surely, 2^190806157 is an apocalyptic number.

It is an amenable number.

190806157 is a deficient number, since it is larger than the sum of its proper divisors (1).

190806157 is an equidigital number, since it uses as much as digits as its factorization.

190806157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 37.

The square root of 190806157 is about 13813.2601872259. The cubic root of 190806157 is about 575.7016332257.

The spelling of 190806157 in words is "one hundred ninety million, eight hundred six thousand, one hundred fifty-seven".