139161690 has 24 divisors (see below), whose sum is σ = 361820628. Its totient is φ = 37109760.

The previous prime is 139161653. The next prime is 139161709. The reversal of 139161690 is 96161931.

139161690 is a `hidden beast` number, since 1 + 39 + 1 + 616 + 9 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 128527569 + 10634121 = 11337^2 + 3261^2 .

It is a super-2 number, since 2×139161690² = 38731951927312200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 773031 + ... + 773210.

Almost surely, 2^139161690 is an apocalyptic number.

139161690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

139161690 is an abundant number, since it is smaller than the sum of its proper divisors (222658938).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

139161690 is a wasteful number, since it uses less digits than its factorization.

139161690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1546254 (or 1546251 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 36.

The square root of 139161690 is about 11796.6813129795. The cubic root of 139161690 is about 518.2109251676.

The spelling of 139161690 in words is "one hundred thirty-nine million, one hundred sixty-one thousand, six hundred ninety".