101979877 has 2 divisors, whose sum is σ = 101979878. Its totient is φ = 101979876.

The previous prime is 101979869. The next prime is 101979919. The reversal of 101979877 is 778979101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68409441 + 33570436 = 8271^2 + 5794^2 .

It is an emirp because it is prime and its reverse (778979101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 101979877 - 2³ = 101979869 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 101979877.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101979827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50989938 + 50989939.

It is an arithmetic number, because the mean of its divisors is an integer number (50989939).

Almost surely, 2^101979877 is an apocalyptic number.

It is an amenable number.

101979877 is a deficient number, since it is larger than the sum of its proper divisors (1).

101979877 is an equidigital number, since it uses as much as digits as its factorization.

101979877 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 222264, while the sum is 49.

The square root of 101979877 is about 10098.5086522714. The cubic root of 101979877 is about 467.2021449092.

The spelling of 101979877 in words is "one hundred one million, nine hundred seventy-nine thousand, eight hundred seventy-seven".