190981379 has 2 divisors, whose sum is σ = 190981380. Its totient is φ = 190981378.

The previous prime is 190981339. The next prime is 190981391. The reversal of 190981379 is 973189091.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 190981379 - 2¹⁶ = 190915843 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (190981319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95490689 + 95490690.

It is an arithmetic number, because the mean of its divisors is an integer number (95490690).

Almost surely, 2^190981379 is an apocalyptic number.

190981379 is a deficient number, since it is larger than the sum of its proper divisors (1).

190981379 is an equidigital number, since it uses as much as digits as its factorization.

190981379 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 122472, while the sum is 47.

The square root of 190981379 is about 13819.6012605285. The cubic root of 190981379 is about 575.8778063116.

The spelling of 190981379 in words is "one hundred ninety million, nine hundred eighty-one thousand, three hundred seventy-nine".