190690739 has 2 divisors, whose sum is σ = 190690740. Its totient is φ = 190690738.

The previous prime is 190690733. The next prime is 190690781. The reversal of 190690739 is 937096091.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-190690739 is a prime.

It is a super-2 number, since 2×190690739² = 72725915880732242, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 190690739.

It is not a weakly prime, because it can be changed into another prime (190690733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95345369 + 95345370.

It is an arithmetic number, because the mean of its divisors is an integer number (95345370).

Almost surely, 2^190690739 is an apocalyptic number.

190690739 is a deficient number, since it is larger than the sum of its proper divisors (1).

190690739 is an equidigital number, since it uses as much as digits as its factorization.

190690739 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 91854, while the sum is 44.

The square root of 190690739 is about 13809.0817580316. The cubic root of 190690739 is about 575.5855298211.

The spelling of 190690739 in words is "one hundred ninety million, six hundred ninety thousand, seven hundred thirty-nine".