189422509 has 4 divisors (see below), whose sum is σ = 192633120. Its totient is φ = 186211900.

The previous prime is 189422479. The next prime is 189422539. The reversal of 189422509 is 905224981.

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: 905224981 = 619 ⋅1462399.

It is an interprime number because it is at equal distance from previous prime (189422479) and next prime (189422539).

It is a cyclic number.

It is not a de Polignac number, because 189422509 - 2¹³ = 189414317 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 (189422539) 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, 1605217 + ... + 1605334.

It is an arithmetic number, because the mean of its divisors is an integer number (48158280).

Almost surely, 2^189422509 is an apocalyptic number.

It is an amenable number.

189422509 is a deficient number, since it is larger than the sum of its proper divisors (3210611).

189422509 is an equidigital number, since it uses as much as digits as its factorization.

189422509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3210610.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 189422509 is about 13763.0850102730. The cubic root of 189422509 is about 574.3066718276.

The spelling of 189422509 in words is "one hundred eighty-nine million, four hundred twenty-two thousand, five hundred nine".