189889707 has 16 divisors (see below), whose sum is σ = 291441920. Its totient is φ = 107726112.

The previous prime is 189889703. The next prime is 189889741. The reversal of 189889707 is 707988981.

It is not a de Polignac number, because 189889707 - 2² = 189889703 is a prime.

It is not an unprimeable number, because it can be changed into a prime (189889703) 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, 29608 + ... + 35445.

It is an arithmetic number, because the mean of its divisors is an integer number (18215120).

Almost surely, 2^189889707 is an apocalyptic number.

189889707 is a deficient number, since it is larger than the sum of its proper divisors (101552213).

189889707 is a wasteful number, since it uses less digits than its factorization.

189889707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65202.

The product of its (nonzero) digits is 2032128, while the sum is 57.

The square root of 189889707 is about 13780.0474237210. The cubic root of 189889707 is about 574.7784472218.

The spelling of 189889707 in words is "one hundred eighty-nine million, eight hundred eighty-nine thousand, seven hundred seven".