139924407 has 8 divisors (see below), whose sum is σ = 213218176. Its totient is φ = 79956792.

The previous prime is 139924381. The next prime is 139924441. The reversal of 139924407 is 704429931.

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

It is not a de Polignac number, because 139924407 - 2¹² = 139920311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139924487) 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, 3331513 + ... + 3331554.

It is an arithmetic number, because the mean of its divisors is an integer number (26652272).

Almost surely, 2^139924407 is an apocalyptic number.

139924407 is a deficient number, since it is larger than the sum of its proper divisors (73293769).

139924407 is an equidigital number, since it uses as much as digits as its factorization.

139924407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6663077.

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 139924407 is about 11828.9647476015. The cubic root of 139924407 is about 519.1559371198.

The spelling of 139924407 in words is "one hundred thirty-nine million, nine hundred twenty-four thousand, four hundred seven".