139055819 has 8 divisors (see below), whose sum is σ = 159038208. Its totient is φ = 119102760.

The previous prime is 139055803. The next prime is 139055837. The reversal of 139055819 is 918550931.

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

It is not a de Polignac number, because 139055819 - 2⁴ = 139055803 is a prime.

It is a super-2 number, since 2×139055819² = 38673041595521522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (139058819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4004 + ... + 17150.

It is an arithmetic number, because the mean of its divisors is an integer number (19879776).

Almost surely, 2^139055819 is an apocalyptic number.

139055819 is a deficient number, since it is larger than the sum of its proper divisors (19982389).

139055819 is a wasteful number, since it uses less digits than its factorization.

139055819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14665.

The product of its (nonzero) digits is 48600, while the sum is 41.

The square root of 139055819 is about 11792.1931378349. The cubic root of 139055819 is about 518.0794775264.

The spelling of 139055819 in words is "one hundred thirty-nine million, fifty-five thousand, eight hundred nineteen".