190981964 has 6 divisors (see below), whose sum is σ = 334218444. Its totient is φ = 95490980.

The previous prime is 190981951. The next prime is 190981981. The reversal of 190981964 is 469189091.

It is a super-2 number, since 2×190981964² = 72948221146594592, which contains 22 as substring.

It is an unprimeable number.

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, 23872742 + ... + 23872749.

It is an arithmetic number, because the mean of its divisors is an integer number (55703074).

Almost surely, 2^190981964 is an apocalyptic number.

It is an amenable number.

190981964 is a deficient number, since it is larger than the sum of its proper divisors (143236480).

190981964 is a wasteful number, since it uses less digits than its factorization.

190981964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47745495 (or 47745493 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 47.

The square root of 190981964 is about 13819.6224261012. The cubic root of 190981964 is about 575.8783943064.

The spelling of 190981964 in words is "one hundred ninety million, nine hundred eighty-one thousand, nine hundred sixty-four".