139694620 has 24 divisors (see below), whose sum is σ = 315925344. Its totient is φ = 51579456.

The previous prime is 139694603. The next prime is 139694623. The reversal of 139694620 is 26496931.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139694623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 268384 + ... + 268903.

It is an arithmetic number, because the mean of its divisors is an integer number (13163556).

Almost surely, 2^139694620 is an apocalyptic number.

139694620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

139694620 is an abundant number, since it is smaller than the sum of its proper divisors (176230724).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

139694620 is a wasteful number, since it uses less digits than its factorization.

139694620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 537309 (or 537307 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 40.

The square root of 139694620 is about 11819.2478610104. The cubic root of 139694620 is about 518.8715915682.

The spelling of 139694620 in words is "one hundred thirty-nine million, six hundred ninety-four thousand, six hundred twenty".