240991549 has 2 divisors, whose sum is σ = 240991550. Its totient is φ = 240991548.

The previous prime is 240991523. The next prime is 240991559. The reversal of 240991549 is 945199042.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 195860025 + 45131524 = 13995^2 + 6718^2 .

It is a cyclic number.

It is not a de Polignac number, because 240991549 - 2¹³ = 240983357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240991559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120495774 + 120495775.

It is an arithmetic number, because the mean of its divisors is an integer number (120495775).

Almost surely, 2^240991549 is an apocalyptic number.

It is an amenable number.

240991549 is a deficient number, since it is larger than the sum of its proper divisors (1).

240991549 is an equidigital number, since it uses as much as digits as its factorization.

240991549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 116640, while the sum is 43.

The square root of 240991549 is about 15523.9025054913. The cubic root of 240991549 is about 622.3011511989.

The spelling of 240991549 in words is "two hundred forty million, nine hundred ninety-one thousand, five hundred forty-nine".