189771374 has 16 divisors (see below), whose sum is σ = 324587088. Its totient is φ = 82434432.

The previous prime is 189771313. The next prime is 189771377. The reversal of 189771374 is 473177981.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189771377) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 214232 + ... + 215115.

It is an arithmetic number, because the mean of its divisors is an integer number (20286693).

Almost surely, 2^189771374 is an apocalyptic number.

189771374 is a deficient number, since it is larger than the sum of its proper divisors (134815714).

189771374 is a wasteful number, since it uses less digits than its factorization.

189771374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429379.

The product of its digits is 296352, while the sum is 47.

The square root of 189771374 is about 13775.7531191583. The cubic root of 189771374 is about 574.6590280912.

The spelling of 189771374 in words is "one hundred eighty-nine million, seven hundred seventy-one thousand, three hundred seventy-four".