107978639 has 2 divisors, whose sum is σ = 107978640. Its totient is φ = 107978638.

The previous prime is 107978609. The next prime is 107978659. The reversal of 107978639 is 936879701.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-107978639 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (107978609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53989319 + 53989320.

It is an arithmetic number, because the mean of its divisors is an integer number (53989320).

Almost surely, 2^107978639 is an apocalyptic number.

107978639 is a deficient number, since it is larger than the sum of its proper divisors (1).

107978639 is an equidigital number, since it uses as much as digits as its factorization.

107978639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 571536, while the sum is 50.

The square root of 107978639 is about 10391.2770629986. The cubic root of 107978639 is about 476.1889167852.

The spelling of 107978639 in words is "one hundred seven million, nine hundred seventy-eight thousand, six hundred thirty-nine".