139389507 has 12 divisors (see below), whose sum is σ = 201800664. Its totient is φ = 92713920.

The previous prime is 139389487. The next prime is 139389541. The reversal of 139389507 is 705983931.

It is a happy number.

139389507 is a `hidden beast` number, since 139 + 3 + 8 + 9 + 507 = 666.

It is not a de Polignac number, because 139389507 - 2⁷ = 139389379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (139389557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13494 + ... + 21467.

It is an arithmetic number, because the mean of its divisors is an integer number (16816722).

Almost surely, 2^139389507 is an apocalyptic number.

139389507 is a deficient number, since it is larger than the sum of its proper divisors (62411157).

139389507 is a wasteful number, since it uses less digits than its factorization.

139389507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35410 (or 35407 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 45.

The square root of 139389507 is about 11806.3333427445. Note that the first 4 decimals coincide. The cubic root of 139389507 is about 518.4935529855.

The spelling of 139389507 in words is "one hundred thirty-nine million, three hundred eighty-nine thousand, five hundred seven".