139091964 has 24 divisors (see below), whose sum is σ = 354052608. Its totient is φ = 42149040.

The previous prime is 139091963. The next prime is 139091983. The reversal of 139091964 is 469190931.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139091963) 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, 526732 + ... + 526995.

It is an arithmetic number, because the mean of its divisors is an integer number (14752192).

Almost surely, 2^139091964 is an apocalyptic number.

It is an amenable number.

139091964 is an abundant number, since it is smaller than the sum of its proper divisors (214960644).

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

139091964 is a wasteful number, since it uses less digits than its factorization.

139091964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1053745 (or 1053743 counting only the distinct ones).

The product of its (nonzero) digits is 52488, while the sum is 42.

The square root of 139091964 is about 11793.7256200066. The cubic root of 139091964 is about 518.1243620449.

The spelling of 139091964 in words is "one hundred thirty-nine million, ninety-one thousand, nine hundred sixty-four".