139534947 has 16 divisors (see below), whose sum is σ = 207797280. Its totient is φ = 92537856.

The previous prime is 139534939. The next prime is 139534973. The reversal of 139534947 is 749435931.

It is not a de Polignac number, because 139534947 - 2³ = 139534939 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (139534247) 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, 8178 + ... + 18599.

It is an arithmetic number, because the mean of its divisors is an integer number (12987330).

Almost surely, 2^139534947 is an apocalyptic number.

139534947 is a deficient number, since it is larger than the sum of its proper divisors (68262333).

139534947 is a wasteful number, since it uses less digits than its factorization.

139534947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26979 (or 26973 counting only the distinct ones).

The product of its digits is 408240, while the sum is 45.

The square root of 139534947 is about 11812.4911428538. The cubic root of 139534947 is about 518.6738235847.

The spelling of 139534947 in words is "one hundred thirty-nine million, five hundred thirty-four thousand, nine hundred forty-seven".