139436651 has 2 divisors, whose sum is σ = 139436652. Its totient is φ = 139436650.

The previous prime is 139436621. The next prime is 139436653. The reversal of 139436651 is 156634931.

139436651 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139436651 is a prime.

Together with 139436653, it forms a pair of twin primes.

It is a Chen prime.

It is a pancake number, because a pancake can be divided into 139436651 parts by 16699 straight cuts.

It is not a weakly prime, because it can be changed into another prime (139436653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69718325 + 69718326.

It is an arithmetic number, because the mean of its divisors is an integer number (69718326).

Almost surely, 2^139436651 is an apocalyptic number.

139436651 is a deficient number, since it is larger than the sum of its proper divisors (1).

139436651 is an equidigital number, since it uses as much as digits as its factorization.

139436651 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58320, while the sum is 38.

The square root of 139436651 is about 11808.3297294749. The cubic root of 139436651 is about 518.5520009642.

The spelling of 139436651 in words is "one hundred thirty-nine million, four hundred thirty-six thousand, six hundred fifty-one".