139977863 has 2 divisors, whose sum is σ = 139977864. Its totient is φ = 139977862.

The previous prime is 139977841. The next prime is 139977889. The reversal of 139977863 is 368779931.

It is a happy number.

139977863 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 139977863 - 2²⁴ = 123200647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139277863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69988931 + 69988932.

It is an arithmetic number, because the mean of its divisors is an integer number (69988932).

Almost surely, 2^139977863 is an apocalyptic number.

139977863 is a deficient number, since it is larger than the sum of its proper divisors (1).

139977863 is an equidigital number, since it uses as much as digits as its factorization.

139977863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1714608, while the sum is 53.

The square root of 139977863 is about 11831.2240702304. The cubic root of 139977863 is about 519.2220405896. Note that the first 3 decimals are identical.

The spelling of 139977863 in words is "one hundred thirty-nine million, nine hundred seventy-seven thousand, eight hundred sixty-three".