240899161 has 2 divisors, whose sum is σ = 240899162. Its totient is φ = 240899160.

The previous prime is 240899123. The next prime is 240899173. The reversal of 240899161 is 161998042.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 205377561 + 35521600 = 14331^2 + 5960^2 .

It is a cyclic number.

It is not a de Polignac number, because 240899161 - 2²⁷ = 106681433 is a prime.

It is not a weakly prime, because it can be changed into another prime (240899101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120449580 + 120449581.

It is an arithmetic number, because the mean of its divisors is an integer number (120449581).

Almost surely, 2^240899161 is an apocalyptic number.

It is an amenable number.

240899161 is a deficient number, since it is larger than the sum of its proper divisors (1).

240899161 is an equidigital number, since it uses as much as digits as its factorization.

240899161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 240899161 is about 15520.9265509505. The cubic root of 240899161 is about 622.2216179711.

The spelling of 240899161 in words is "two hundred forty million, eight hundred ninety-nine thousand, one hundred sixty-one".