139012897 has 16 divisors (see below), whose sum is σ = 150543360. Its totient is φ = 127987200.

The previous prime is 139012889. The next prime is 139012901. The reversal of 139012897 is 798210931.

It is a cyclic number.

It is not a de Polignac number, because 139012897 - 2³ = 139012889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139012807) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 171429 + ... + 172237.

It is an arithmetic number, because the mean of its divisors is an integer number (9408960).

Almost surely, 2^139012897 is an apocalyptic number.

It is an amenable number.

139012897 is a deficient number, since it is larger than the sum of its proper divisors (11530463).

139012897 is a wasteful number, since it uses less digits than its factorization.

139012897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1104.

The product of its (nonzero) digits is 27216, while the sum is 40.

The square root of 139012897 is about 11790.3730644963. The cubic root of 139012897 is about 518.0261672902.

The spelling of 139012897 in words is "one hundred thirty-nine million, twelve thousand, eight hundred ninety-seven".