189937451 has 6 divisors (see below), whose sum is σ = 208774356. Its totient is φ = 172670300.

The previous prime is 189937441. The next prime is 189937463. The reversal of 189937451 is 154739981.

It is a de Polignac number, because none of the positive numbers 2^k-189937451 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 189937396 and 189937405.

It is not an unprimeable number, because it can be changed into a prime (189937411) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 784745 + ... + 784986.

It is an arithmetic number, because the mean of its divisors is an integer number (34795726).

Almost surely, 2^189937451 is an apocalyptic number.

189937451 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

189937451 is a deficient number, since it is larger than the sum of its proper divisors (18836905).

189937451 is a wasteful number, since it uses less digits than its factorization.

189937451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1569753 (or 1569742 counting only the distinct ones).

The product of its digits is 272160, while the sum is 47.

The square root of 189937451 is about 13781.7796746284. The cubic root of 189937451 is about 574.8266153980.

The spelling of 189937451 in words is "one hundred eighty-nine million, nine hundred thirty-seven thousand, four hundred fifty-one".