189953615 has 16 divisors (see below), whose sum is σ = 234541440. Its totient is φ = 147598080.

The previous prime is 189953587. The next prime is 189953633. The reversal of 189953615 is 516359981.

It is not a de Polignac number, because 189953615 - 2¹⁰ = 189952591 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 189953615.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47057 + ... + 50933.

It is an arithmetic number, because the mean of its divisors is an integer number (14658840).

Almost surely, 2^189953615 is an apocalyptic number.

189953615 is a deficient number, since it is larger than the sum of its proper divisors (44587825).

189953615 is a wasteful number, since it uses less digits than its factorization.

189953615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4162.

The product of its digits is 291600, while the sum is 47.

The square root of 189953615 is about 13782.3660885931. The cubic root of 189953615 is about 574.8429211762.

The spelling of 189953615 in words is "one hundred eighty-nine million, nine hundred fifty-three thousand, six hundred fifteen".