189953507 has 12 divisors (see below), whose sum is σ = 201570336. Its totient is φ = 178975440.

The previous prime is 189953503. The next prime is 189953539. The reversal of 189953507 is 705359981.

It is not a de Polignac number, because 189953507 - 2² = 189953503 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189953503) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 69782 + ... + 72452.

It is an arithmetic number, because the mean of its divisors is an integer number (16797528).

Almost surely, 2^189953507 is an apocalyptic number.

189953507 is a deficient number, since it is larger than the sum of its proper divisors (11616829).

189953507 is a wasteful number, since it uses less digits than its factorization.

189953507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2906 (or 2887 counting only the distinct ones).

The product of its (nonzero) digits is 340200, while the sum is 47.

The square root of 189953507 is about 13782.3621705425. The cubic root of 189953507 is about 574.8428122320.

The spelling of 189953507 in words is "one hundred eighty-nine million, nine hundred fifty-three thousand, five hundred seven".