139469915 has 32 divisors (see below), whose sum is σ = 186955776. Its totient is φ = 99227520.

The previous prime is 139469881. The next prime is 139469927. The reversal of 139469915 is 519964931.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-139469915 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 139469915.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 216584 + ... + 217226.

It is an arithmetic number, because the mean of its divisors is an integer number (5842368).

Almost surely, 2^139469915 is an apocalyptic number.

139469915 is a deficient number, since it is larger than the sum of its proper divisors (47485861).

139469915 is a wasteful number, since it uses less digits than its factorization.

139469915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 779.

The product of its digits is 262440, while the sum is 47.

The square root of 139469915 is about 11809.7381427363. The cubic root of 139469915 is about 518.5932329314.

The spelling of 139469915 in words is "one hundred thirty-nine million, four hundred sixty-nine thousand, nine hundred fifteen".