139386554 has 8 divisors (see below), whose sum is σ = 209177748. Its totient is φ = 69660640.

The previous prime is 139386539. The next prime is 139386563. The reversal of 139386554 is 455683931.

139386554 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 133934329 + 5452225 = 11573^2 + 2335^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×139386554² = 38857222871989832, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10577 + ... + 19764.

Almost surely, 2^139386554 is an apocalyptic number.

139386554 is a deficient number, since it is larger than the sum of its proper divisors (69791194).

139386554 is a wasteful number, since it uses less digits than its factorization.

139386554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32640.

The product of its digits is 388800, while the sum is 44.

The square root of 139386554 is about 11806.2082820862. The cubic root of 139386554 is about 518.4898914897.

The spelling of 139386554 in words is "one hundred thirty-nine million, three hundred eighty-six thousand, five hundred fifty-four".