100651961 has 2 divisors, whose sum is σ = 100651962. Its totient is φ = 100651960.

The previous prime is 100651939. The next prime is 100651997. The reversal of 100651961 is 169156001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 93006736 + 7645225 = 9644^2 + 2765^2 .

It is a cyclic number.

It is not a de Polignac number, because 100651961 - 2⁶ = 100651897 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (100651931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50325980 + 50325981.

It is an arithmetic number, because the mean of its divisors is an integer number (50325981).

Almost surely, 2^100651961 is an apocalyptic number.

It is an amenable number.

100651961 is a deficient number, since it is larger than the sum of its proper divisors (1).

100651961 is an equidigital number, since it uses as much as digits as its factorization.

100651961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 29.

The square root of 100651961 is about 10032.5450908531. The cubic root of 100651961 is about 465.1654107639.

The spelling of 100651961 in words is "one hundred million, six hundred fifty-one thousand, nine hundred sixty-one".