190013391 has 16 divisors (see below), whose sum is σ = 281914720. Its totient is φ = 126489600.

The previous prime is 190013387. The next prime is 190013401. The reversal of 190013391 is 193310091.

It is not a de Polignac number, because 190013391 - 2² = 190013387 is a prime.

It is a super-2 number, since 2×190013391² = 72210177518637762, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190013371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14991 + ... + 24591.

It is an arithmetic number, because the mean of its divisors is an integer number (17619670).

Almost surely, 2^190013391 is an apocalyptic number.

190013391 is a deficient number, since it is larger than the sum of its proper divisors (91901329).

190013391 is an equidigital number, since it uses as much as digits as its factorization.

190013391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10343 (or 10337 counting only the distinct ones).

The product of its (nonzero) digits is 729, while the sum is 27.

The square root of 190013391 is about 13784.5344861551. The cubic root of 190013391 is about 574.9032134510.

The spelling of 190013391 in words is "one hundred ninety million, thirteen thousand, three hundred ninety-one".