139190491 has 8 divisors (see below), whose sum is σ = 152064000. Its totient is φ = 126353640.

The previous prime is 139190479. The next prime is 139190497. The reversal of 139190491 is 194091931.

139190491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 139190491 - 2⁹ = 139189979 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 139190491.

It is not an unprimeable number, because it can be changed into a prime (139190497) 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, 891 + ... + 16708.

It is an arithmetic number, because the mean of its divisors is an integer number (19008000).

Almost surely, 2^139190491 is an apocalyptic number.

139190491 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

139190491 is a deficient number, since it is larger than the sum of its proper divisors (12873509).

139190491 is a wasteful number, since it uses less digits than its factorization.

139190491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18329.

The product of its (nonzero) digits is 8748, while the sum is 37.

The square root of 139190491 is about 11797.9019745038. The cubic root of 139190491 is about 518.2466724660.

The spelling of 139190491 in words is "one hundred thirty-nine million, one hundred ninety thousand, four hundred ninety-one".