139109894 has 16 divisors (see below), whose sum is σ = 260153856. Its totient is φ = 54198600.

The previous prime is 139109891. The next prime is 139109917. The reversal of 139109894 is 498901931.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139109891) 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, 451502 + ... + 451809.

It is an arithmetic number, because the mean of its divisors is an integer number (16259616).

Almost surely, 2^139109894 is an apocalyptic number.

139109894 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

139109894 is a deficient number, since it is larger than the sum of its proper divisors (121043962).

139109894 is a wasteful number, since it uses less digits than its factorization.

139109894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 903331.

The product of its (nonzero) digits is 69984, while the sum is 44.

The square root of 139109894 is about 11794.4857454660. The cubic root of 139109894 is about 518.1466244637.

The spelling of 139109894 in words is "one hundred thirty-nine million, one hundred nine thousand, eight hundred ninety-four".