190918253 has 2 divisors, whose sum is σ = 190918254. Its totient is φ = 190918252.

The previous prime is 190918249. The next prime is 190918271. The reversal of 190918253 is 352819091.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 178436164 + 12482089 = 13358^2 + 3533^2 .

It is a cyclic number.

It is not a de Polignac number, because 190918253 - 2² = 190918249 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (190918283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95459126 + 95459127.

It is an arithmetic number, because the mean of its divisors is an integer number (95459127).

Almost surely, 2^190918253 is an apocalyptic number.

It is an amenable number.

190918253 is a deficient number, since it is larger than the sum of its proper divisors (1).

190918253 is an equidigital number, since it uses as much as digits as its factorization.

190918253 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 38.

The square root of 190918253 is about 13817.3171419057. The cubic root of 190918253 is about 575.8143500930.

The spelling of 190918253 in words is "one hundred ninety million, nine hundred eighteen thousand, two hundred fifty-three".