189470913 has 4 divisors (see below), whose sum is σ = 252627888. Its totient is φ = 126313940.

The previous prime is 189470909. The next prime is 189470917. The reversal of 189470913 is 319074981.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 319074981 = 3 ⋅106358327.

It is an interprime number because it is at equal distance from previous prime (189470909) and next prime (189470917).

It is a cyclic number.

It is not a de Polignac number, because 189470913 - 2² = 189470909 is a prime.

It is not an unprimeable number, because it can be changed into a prime (189470917) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31578483 + ... + 31578488.

It is an arithmetic number, because the mean of its divisors is an integer number (63156972).

Almost surely, 2^189470913 is an apocalyptic number.

It is an amenable number.

189470913 is a deficient number, since it is larger than the sum of its proper divisors (63156975).

189470913 is an equidigital number, since it uses as much as digits as its factorization.

189470913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63156974.

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 189470913 is about 13764.8433699770. The cubic root of 189470913 is about 574.3555860648.

The spelling of 189470913 in words is "one hundred eighty-nine million, four hundred seventy thousand, nine hundred thirteen".