191989706974 has 32 divisors (see below), whose sum is σ = 320183652096. Its totient is φ = 85740975360.

The previous prime is 191989706971. The next prime is 191989706977. The reversal of 191989706974 is 479607989191.

191989706974 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (191989706971) and next prime (191989706977).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191989706971) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10611624 + ... + 10629700.

It is an arithmetic number, because the mean of its divisors is an integer number (10005739128).

Almost surely, 2^191989706974 is an apocalyptic number.

191989706974 is a deficient number, since it is larger than the sum of its proper divisors (128193945122).

191989706974 is a wasteful number, since it uses less digits than its factorization.

191989706974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31300.

The product of its (nonzero) digits is 61725888, while the sum is 70.

The spelling of 191989706974 in words is "one hundred ninety-one billion, nine hundred eighty-nine million, seven hundred six thousand, nine hundred seventy-four".