139202986 has 16 divisors (see below), whose sum is σ = 225185184. Its totient is φ = 64156464.

The previous prime is 139202971. The next prime is 139202993. The reversal of 139202986 is 689202931.

It is a happy number.

It is a super-2 number, since 2×139202986² = 38754942622632392, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17061 + ... + 23863.

It is an arithmetic number, because the mean of its divisors is an integer number (14074074).

Almost surely, 2^139202986 is an apocalyptic number.

139202986 is a deficient number, since it is larger than the sum of its proper divisors (85982198).

139202986 is a wasteful number, since it uses less digits than its factorization.

139202986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7605.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 139202986 is about 11798.4315059248. The cubic root of 139202986 is about 518.2621795081.

Subtracting 139202986 from its reverse (689202931), we obtain a palindrome (549999945).

The spelling of 139202986 in words is "one hundred thirty-nine million, two hundred two thousand, nine hundred eighty-six".