139472973 has 6 divisors (see below), whose sum is σ = 201460974. Its totient is φ = 92981976.

The previous prime is 139472959. The next prime is 139473001. The reversal of 139472973 is 379274931.

It can be written as a sum of positive squares in only one way, i.e., 138721284 + 751689 = 11778^2 + 867^2 .

It is not a de Polignac number, because 139472973 - 2⁵ = 139472941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139472903) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7748490 + ... + 7748507.

It is an arithmetic number, because the mean of its divisors is an integer number (33576829).

Almost surely, 2^139472973 is an apocalyptic number.

It is an amenable number.

139472973 is a deficient number, since it is larger than the sum of its proper divisors (61988001).

139472973 is a wasteful number, since it uses less digits than its factorization.

139472973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15497003 (or 15497000 counting only the distinct ones).

The product of its digits is 285768, while the sum is 45.

The square root of 139472973 is about 11809.8676114510. The cubic root of 139472973 is about 518.5970231073.

The spelling of 139472973 in words is "one hundred thirty-nine million, four hundred seventy-two thousand, nine hundred seventy-three".