190639432729 has 2 divisors, whose sum is σ = 190639432730. Its totient is φ = 190639432728.

The previous prime is 190639432637. The next prime is 190639432741. The reversal of 190639432729 is 927234936091.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 189817062400 + 822370329 = 435680^2 + 28677^2 .

It is a cyclic number.

It is not a de Polignac number, because 190639432729 - 2³⁷ = 53200479257 is a prime.

It is a super-2 number, since 2×190639432729² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 190639432729.

It is not a weakly prime, because it can be changed into another prime (190639432229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95319716364 + 95319716365.

It is an arithmetic number, because the mean of its divisors is an integer number (95319716365).

Almost surely, 2^190639432729 is an apocalyptic number.

It is an amenable number.

190639432729 is a deficient number, since it is larger than the sum of its proper divisors (1).

190639432729 is an equidigital number, since it uses as much as digits as its factorization.

190639432729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4408992, while the sum is 55.

The spelling of 190639432729 in words is "one hundred ninety billion, six hundred thirty-nine million, four hundred thirty-two thousand, seven hundred twenty-nine".