2540430697 has 4 divisors (see below), whose sum is σ = 2903349376. Its totient is φ = 2177512020.

The previous prime is 2540430691. The next prime is 2540430713. The reversal of 2540430697 is 7960340452.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2540430697 - 2¹⁹ = 2539906409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2540430691) 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 in 3 ways as a sum of consecutive naturals, for example, 181459329 + ... + 181459342.

It is an arithmetic number, because the mean of its divisors is an integer number (725837344).

Almost surely, 2^2540430697 is an apocalyptic number.

It is an amenable number.

2540430697 is a deficient number, since it is larger than the sum of its proper divisors (362918679).

2540430697 is an equidigital number, since it uses as much as digits as its factorization.

2540430697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362918678.

The product of its (nonzero) digits is 181440, while the sum is 40.

The square root of 2540430697 is about 50402.6854145689. The cubic root of 2540430697 is about 1364.4861044144.

The spelling of 2540430697 in words is "two billion, five hundred forty million, four hundred thirty thousand, six hundred ninety-seven".