2168754961 has 2 divisors, whose sum is σ = 2168754962. Its totient is φ = 2168754960.

The previous prime is 2168754869. The next prime is 2168754967. The reversal of 2168754961 is 1694578612.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2158159936 + 10595025 = 46456^2 + 3255^2 .

It is a cyclic number.

It is not a de Polignac number, because 2168754961 - 2¹⁷ = 2168623889 is a prime.

It is a super-2 number, since 2×2168754961² = 9406996161724223042, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2168754967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1084377480 + 1084377481.

It is an arithmetic number, because the mean of its divisors is an integer number (1084377481).

Almost surely, 2^2168754961 is an apocalyptic number.

It is an amenable number.

2168754961 is a deficient number, since it is larger than the sum of its proper divisors (1).

2168754961 is an equidigital number, since it uses as much as digits as its factorization.

2168754961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 725760, while the sum is 49.

The square root of 2168754961 is about 46569.8932895492. The cubic root of 2168754961 is about 1294.4049404050.

The spelling of 2168754961 in words is "two billion, one hundred sixty-eight million, seven hundred fifty-four thousand, nine hundred sixty-one".