190503989 has 8 divisors (see below), whose sum is σ = 217226520. Its totient is φ = 165505536.

The previous prime is 190503961. The next prime is 190504001. The reversal of 190503989 is 989305091.

It can be written as a sum of positive squares in 4 ways, for example, as 339889 + 190164100 = 583^2 + 13790^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-190503989 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 (190503949) 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, 430784 + ... + 431225.

It is an arithmetic number, because the mean of its divisors is an integer number (27153315).

Almost surely, 2^190503989 is an apocalyptic number.

It is an amenable number.

190503989 is a deficient number, since it is larger than the sum of its proper divisors (26722531).

190503989 is a wasteful number, since it uses less digits than its factorization.

190503989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 862039.

The product of its (nonzero) digits is 87480, while the sum is 44.

The square root of 190503989 is about 13802.3182473090. The cubic root of 190503989 is about 575.3975715471.

The spelling of 190503989 in words is "one hundred ninety million, five hundred three thousand, nine hundred eighty-nine".