189591797 has 8 divisors (see below), whose sum is σ = 192804480. Its totient is φ = 186394320.

The previous prime is 189591781. The next prime is 189591851. The reversal of 189591797 is 797195981.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 189591797 - 2⁴ = 189591781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189591707) 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, 22904 + ... + 30062.

It is an arithmetic number, because the mean of its divisors is an integer number (24100560).

Almost surely, 2^189591797 is an apocalyptic number.

It is an amenable number.

189591797 is a deficient number, since it is larger than the sum of its proper divisors (3212683).

189591797 is an equidigital number, since it uses as much as digits as its factorization.

189591797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7603.

The product of its digits is 1428840, while the sum is 56.

The square root of 189591797 is about 13769.2337114307. The cubic root of 189591797 is about 574.4777079587.

The spelling of 189591797 in words is "one hundred eighty-nine million, five hundred ninety-one thousand, seven hundred ninety-seven".