190918689 has 8 divisors (see below), whose sum is σ = 274139712. Its totient is φ = 117488400.

The previous prime is 190918661. The next prime is 190918723. The reversal of 190918689 is 986819091.

It is a happy number.

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

It is not a de Polignac number, because 190918689 - 2⁵ = 190918657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (190918489) 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, 2447637 + ... + 2447714.

It is an arithmetic number, because the mean of its divisors is an integer number (34267464).

Almost surely, 2^190918689 is an apocalyptic number.

It is an amenable number.

190918689 is a deficient number, since it is larger than the sum of its proper divisors (83221023).

190918689 is a wasteful number, since it uses less digits than its factorization.

190918689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4895367.

The product of its (nonzero) digits is 279936, while the sum is 51.

The square root of 190918689 is about 13817.3329191997. The cubic root of 190918689 is about 575.8147884217.

The spelling of 190918689 in words is "one hundred ninety million, nine hundred eighteen thousand, six hundred eighty-nine".