101078639 has 2 divisors, whose sum is σ = 101078640. Its totient is φ = 101078638.

The previous prime is 101078611. The next prime is 101078669. The reversal of 101078639 is 936870101.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 101078639 - 2¹² = 101074543 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 101078599 and 101078608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101078609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50539319 + 50539320.

It is an arithmetic number, because the mean of its divisors is an integer number (50539320).

Almost surely, 2^101078639 is an apocalyptic number.

101078639 is a deficient number, since it is larger than the sum of its proper divisors (1).

101078639 is an equidigital number, since it uses as much as digits as its factorization.

101078639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 101078639 is about 10053.7872963376. The cubic root of 101078639 is about 465.8217849600.

The spelling of 101078639 in words is "one hundred one million, seventy-eight thousand, six hundred thirty-nine".