139240437 has 16 divisors (see below), whose sum is σ = 219021312. Its totient is φ = 76998960.

The previous prime is 139240403. The next prime is 139240471. The reversal of 139240437 is 734042931.

139240437 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (139240403) and next prime (139240471).

It is not a de Polignac number, because 139240437 - 2¹⁶ = 139174901 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 139240398 and 139240407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139240477) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 106293 + ... + 107594.

It is an arithmetic number, because the mean of its divisors is an integer number (13688832).

Almost surely, 2^139240437 is an apocalyptic number.

It is an amenable number.

139240437 is a deficient number, since it is larger than the sum of its proper divisors (79780875).

139240437 is a wasteful number, since it uses less digits than its factorization.

139240437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213928.

The product of its (nonzero) digits is 18144, while the sum is 33.

The square root of 139240437 is about 11800.0185169346. The cubic root of 139240437 is about 518.3086528802.

The spelling of 139240437 in words is "one hundred thirty-nine million, two hundred forty thousand, four hundred thirty-seven".