240579991 has 2 divisors, whose sum is σ = 240579992. Its totient is φ = 240579990.

The previous prime is 240579961. The next prime is 240580003. The reversal of 240579991 is 199975042.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 240579991 - 2¹⁷ = 240448919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240579961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120289995 + 120289996.

It is an arithmetic number, because the mean of its divisors is an integer number (120289996).

Almost surely, 2^240579991 is an apocalyptic number.

240579991 is a deficient number, since it is larger than the sum of its proper divisors (1).

240579991 is an equidigital number, since it uses as much as digits as its factorization.

240579991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 204120, while the sum is 46.

The square root of 240579991 is about 15510.6412182089. The cubic root of 240579991 is about 621.9467003883.

The spelling of 240579991 in words is "two hundred forty million, five hundred seventy-nine thousand, nine hundred ninety-one".