139906319 has 6 divisors (see below), whose sum is σ = 162748224. Its totient is φ = 119919660.

The previous prime is 139906313. The next prime is 139906321. The reversal of 139906319 is 913609931.

139906319 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 139906319 - 2¹² = 139902223 is a prime.

It is a super-2 number, since 2×139906319² = 39147556192259522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139906313) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1427567 + ... + 1427664.

It is an arithmetic number, because the mean of its divisors is an integer number (27124704).

Almost surely, 2^139906319 is an apocalyptic number.

139906319 is a deficient number, since it is larger than the sum of its proper divisors (22841905).

139906319 is an equidigital number, since it uses as much as digits as its factorization.

139906319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2855245 (or 2855238 counting only the distinct ones).

The product of its (nonzero) digits is 39366, while the sum is 41.

The square root of 139906319 is about 11828.2001589422. The cubic root of 139906319 is about 519.1335657612.

The spelling of 139906319 in words is "one hundred thirty-nine million, nine hundred six thousand, three hundred nineteen".