190508991 has 8 divisors (see below), whose sum is σ = 267381120. Its totient is φ = 120321432.

The previous prime is 190508971. The next prime is 190509013. The reversal of 190508991 is 199805091.

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

It is not a de Polignac number, because 190508991 - 2¹⁷ = 190377919 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190508911) 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, 1671075 + ... + 1671188.

It is an arithmetic number, because the mean of its divisors is an integer number (33422640).

Almost surely, 2^190508991 is an apocalyptic number.

190508991 is a deficient number, since it is larger than the sum of its proper divisors (76872129).

190508991 is a wasteful number, since it uses less digits than its factorization.

190508991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3342285.

The product of its (nonzero) digits is 29160, while the sum is 42.

The square root of 190508991 is about 13802.4994475638. The cubic root of 190508991 is about 575.4026075107.

The spelling of 190508991 in words is "one hundred ninety million, five hundred eight thousand, nine hundred ninety-one".