1240099843 has 2 divisors, whose sum is σ = 1240099844. Its totient is φ = 1240099842.

The previous prime is 1240099829. The next prime is 1240099859. The reversal of 1240099843 is 3489900421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1240099843 - 2¹⁷ = 1239968771 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1240099796 and 1240099805.

It is not a weakly prime, because it can be changed into another prime (1240099813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620049921 + 620049922.

It is an arithmetic number, because the mean of its divisors is an integer number (620049922).

Almost surely, 2^1240099843 is an apocalyptic number.

1240099843 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240099843 is an equidigital number, since it uses as much as digits as its factorization.

1240099843 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 1240099843 is about 35215.0513701173. The cubic root of 1240099843 is about 1074.3659049022.

The spelling of 1240099843 in words is "one billion, two hundred forty million, ninety-nine thousand, eight hundred forty-three".