2540399783 has 2 divisors, whose sum is σ = 2540399784. Its totient is φ = 2540399782.

The previous prime is 2540399759. The next prime is 2540399791. The reversal of 2540399783 is 3879930452.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2540399783 - 2⁸ = 2540399527 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2540399753) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1270199891 + 1270199892.

It is an arithmetic number, because the mean of its divisors is an integer number (1270199892).

Almost surely, 2^2540399783 is an apocalyptic number.

2540399783 is a deficient number, since it is larger than the sum of its proper divisors (1).

2540399783 is an equidigital number, since it uses as much as digits as its factorization.

2540399783 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1632960, while the sum is 50.

The square root of 2540399783 is about 50402.3787434681. The cubic root of 2540399783 is about 1364.4805696712.

The spelling of 2540399783 in words is "two billion, five hundred forty million, three hundred ninety-nine thousand, seven hundred eighty-three".