101980651 has 2 divisors, whose sum is σ = 101980652. Its totient is φ = 101980650.

The previous prime is 101980601. The next prime is 101980667. The reversal of 101980651 is 156089101.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 101980651 - 2²¹ = 99883499 is a prime.

It is not a weakly prime, because it can be changed into another prime (101980601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50990325 + 50990326.

It is an arithmetic number, because the mean of its divisors is an integer number (50990326).

Almost surely, 2^101980651 is an apocalyptic number.

101980651 is a deficient number, since it is larger than the sum of its proper divisors (1).

101980651 is an equidigital number, since it uses as much as digits as its factorization.

101980651 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 31.

The square root of 101980651 is about 10098.5469746890. The cubic root of 101980651 is about 467.2033268860.

The spelling of 101980651 in words is "one hundred one million, nine hundred eighty thousand, six hundred fifty-one".