139444651 has 2 divisors, whose sum is σ = 139444652. Its totient is φ = 139444650.

The previous prime is 139444631. The next prime is 139444703. The reversal of 139444651 is 156444931.

139444651 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 139444651 - 2¹⁷ = 139313579 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 139444651.

It is not a weakly prime, because it can be changed into another prime (139444631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69722325 + 69722326.

It is an arithmetic number, because the mean of its divisors is an integer number (69722326).

Almost surely, 2^139444651 is an apocalyptic number.

139444651 is a deficient number, since it is larger than the sum of its proper divisors (1).

139444651 is an equidigital number, since it uses as much as digits as its factorization.

139444651 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 37.

The square root of 139444651 is about 11808.6684685446. The cubic root of 139444651 is about 518.5619178611.

The spelling of 139444651 in words is "one hundred thirty-nine million, four hundred forty-four thousand, six hundred fifty-one".