139487854 has 64 divisors (see below), whose sum is σ = 256089600. Its totient is φ = 56246400.

The previous prime is 139487837. The next prime is 139487857. The reversal of 139487854 is 458784931.

It is a super-2 number, since 2×139487854² = 38913722827050632, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 139487798 and 139487807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139487857) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 448359 + ... + 448669.

It is an arithmetic number, because the mean of its divisors is an integer number (4001400).

Almost surely, 2^139487854 is an apocalyptic number.

139487854 is a deficient number, since it is larger than the sum of its proper divisors (116601746).

139487854 is a wasteful number, since it uses less digits than its factorization.

139487854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409.

The product of its digits is 967680, while the sum is 49.

The square root of 139487854 is about 11810.4976186442. The cubic root of 139487854 is about 518.6154662692.

The spelling of 139487854 in words is "one hundred thirty-nine million, four hundred eighty-seven thousand, eight hundred fifty-four".