2405767997 has 4 divisors (see below), whose sum is σ = 2451159900. Its totient is φ = 2360376096.

The previous prime is 2405767957. The next prime is 2405768059. The reversal of 2405767997 is 7997675042.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1080371161 + 1325396836 = 32869^2 + 36406^2 .

It is a cyclic number.

It is not a de Polignac number, because 2405767997 - 2¹² = 2405763901 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2405767957) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22695872 + ... + 22695977.

It is an arithmetic number, because the mean of its divisors is an integer number (612789975).

Almost surely, 2^2405767997 is an apocalyptic number.

It is an amenable number.

2405767997 is a deficient number, since it is larger than the sum of its proper divisors (45391903).

2405767997 is an equidigital number, since it uses as much as digits as its factorization.

2405767997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45391902.

The product of its (nonzero) digits is 6667920, while the sum is 56.

The square root of 2405767997 is about 49048.6289003067. The cubic root of 2405767997 is about 1339.9376218457.

The spelling of 2405767997 in words is "two billion, four hundred five million, seven hundred sixty-seven thousand, nine hundred ninety-seven".