139282731 has 12 divisors (see below), whose sum is σ = 229927152. Its totient is φ = 79590096.

The previous prime is 139282697. The next prime is 139282769. The reversal of 139282731 is 137282931.

It is not a de Polignac number, because 139282731 - 2⁹ = 139282219 is a prime.

It is a super-2 number, since 2×139282731² = 38799358309636722, 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 not an unprimeable number, because it can be changed into a prime (139282771) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1105356 + ... + 1105481.

It is an arithmetic number, because the mean of its divisors is an integer number (19160596).

Almost surely, 2^139282731 is an apocalyptic number.

139282731 is a deficient number, since it is larger than the sum of its proper divisors (90644421).

139282731 is a wasteful number, since it uses less digits than its factorization.

139282731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2210850 (or 2210847 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 139282731 is about 11801.8104966992. The cubic root of 139282731 is about 518.3611259680.

The spelling of 139282731 in words is "one hundred thirty-nine million, two hundred eighty-two thousand, seven hundred thirty-one".