190424257 has 2 divisors, whose sum is σ = 190424258. Its totient is φ = 190424256.

The previous prime is 190424233. The next prime is 190424279. The reversal of 190424257 is 752424091.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 177528976 + 12895281 = 13324^2 + 3591^2 .

It is a cyclic number.

It is not a de Polignac number, because 190424257 - 2²³ = 182035649 is a prime.

It is a super-2 number, since 2×190424257² = 72522795308004098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (190424287) 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, 95212128 + 95212129.

It is an arithmetic number, because the mean of its divisors is an integer number (95212129).

Almost surely, 2^190424257 is an apocalyptic number.

It is an amenable number.

190424257 is a deficient number, since it is larger than the sum of its proper divisors (1).

190424257 is an equidigital number, since it uses as much as digits as its factorization.

190424257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 190424257 is about 13799.4295896606. The cubic root of 190424257 is about 575.3172862622.

The spelling of 190424257 in words is "one hundred ninety million, four hundred twenty-four thousand, two hundred fifty-seven".