139259990 has 16 divisors (see below), whose sum is σ = 253253952. Its totient is φ = 55129344.

The previous prime is 139259951. The next prime is 139259993. The reversal of 139259990 is 99952931.

It is a super-3 number, since 3×139259990³ (a number of 25 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139259993) 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, 70814 + ... + 72753.

It is an arithmetic number, because the mean of its divisors is an integer number (15828372).

Almost surely, 2^139259990 is an apocalyptic number.

139259990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

139259990 is a deficient number, since it is larger than the sum of its proper divisors (113993962).

139259990 is a wasteful number, since it uses less digits than its factorization.

139259990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143671.

The product of its (nonzero) digits is 196830, while the sum is 47.

The square root of 139259990 is about 11800.8470034994. The cubic root of 139259990 is about 518.3329131094.

The spelling of 139259990 in words is "one hundred thirty-nine million, two hundred fifty-nine thousand, nine hundred ninety".