190923155 has 4 divisors (see below), whose sum is σ = 229107792. Its totient is φ = 152738520.

The previous prime is 190923151. The next prime is 190923163. The reversal of 190923155 is 551329091.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 190923155 - 2² = 190923151 is a prime.

It is a super-2 number, since 2×190923155² = 72903302230308050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (190923151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19092311 + ... + 19092320.

It is an arithmetic number, because the mean of its divisors is an integer number (57276948).

Almost surely, 2^190923155 is an apocalyptic number.

190923155 is a deficient number, since it is larger than the sum of its proper divisors (38184637).

190923155 is an equidigital number, since it uses as much as digits as its factorization.

190923155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38184636.

The product of its (nonzero) digits is 12150, while the sum is 35.

The square root of 190923155 is about 13817.4945268670. The cubic root of 190923155 is about 575.8192782367.

The spelling of 190923155 in words is "one hundred ninety million, nine hundred twenty-three thousand, one hundred fifty-five".