240742991 has 2 divisors, whose sum is σ = 240742992. Its totient is φ = 240742990.

The previous prime is 240742987. The next prime is 240743051. The reversal of 240742991 is 199247042.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 240742991 - 2² = 240742987 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240742921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120371495 + 120371496.

It is an arithmetic number, because the mean of its divisors is an integer number (120371496).

Almost surely, 2^240742991 is an apocalyptic number.

240742991 is a deficient number, since it is larger than the sum of its proper divisors (1).

240742991 is an equidigital number, since it uses as much as digits as its factorization.

240742991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 240742991 is about 15515.8947856706. The cubic root of 240742991 is about 622.0871310548.

The spelling of 240742991 in words is "two hundred forty million, seven hundred forty-two thousand, nine hundred ninety-one".