190957643 has 2 divisors, whose sum is σ = 190957644. Its totient is φ = 190957642.

The previous prime is 190957609. The next prime is 190957649. The reversal of 190957643 is 346759091.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 190957643 - 2⁸ = 190957387 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 190957594 and 190957603.

It is not a weakly prime, because it can be changed into another prime (190957649) 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, 95478821 + 95478822.

It is an arithmetic number, because the mean of its divisors is an integer number (95478822).

Almost surely, 2^190957643 is an apocalyptic number.

190957643 is a deficient number, since it is larger than the sum of its proper divisors (1).

190957643 is an equidigital number, since it uses as much as digits as its factorization.

190957643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 204120, while the sum is 44.

The square root of 190957643 is about 13818.7424536388. The cubic root of 190957643 is about 575.8539477868.

The spelling of 190957643 in words is "one hundred ninety million, nine hundred fifty-seven thousand, six hundred forty-three".