139002881 has 2 divisors, whose sum is σ = 139002882. Its totient is φ = 139002880.

The previous prime is 139002859. The next prime is 139002883. The reversal of 139002881 is 188200931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71910400 + 67092481 = 8480^2 + 8191^2 .

It is a cyclic number.

It is not a de Polignac number, because 139002881 - 2²² = 134808577 is a prime.

It is a super-2 number, since 2×139002881² = 38643601852600322, which contains 22 as substring.

Together with 139002883, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (139002883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69501440 + 69501441.

It is an arithmetic number, because the mean of its divisors is an integer number (69501441).

Almost surely, 2^139002881 is an apocalyptic number.

It is an amenable number.

139002881 is a deficient number, since it is larger than the sum of its proper divisors (1).

139002881 is an equidigital number, since it uses as much as digits as its factorization.

139002881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 139002881 is about 11789.9483035338. The cubic root of 139002881 is about 518.0137255796.

The spelling of 139002881 in words is "one hundred thirty-nine million, two thousand, eight hundred eighty-one".