2400997 has 4 divisors (see below), whose sum is σ = 2483820. Its totient is φ = 2318176.

The previous prime is 2400989. The next prime is 2401013. The reversal of 2400997 is 7990042.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7990042 = 2 ⋅3995021.

It can be written as a sum of positive squares in 2 ways, for example, as 1718721 + 682276 = 1311^2 + 826^2 .

It is a cyclic number.

It is not a de Polignac number, because 2400997 - 2³ = 2400989 is a prime.

It is a Duffinian number.

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2400907) 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, 41368 + ... + 41425.

It is an arithmetic number, because the mean of its divisors is an integer number (620955).

2^2400997 is an apocalyptic number.

It is an amenable number.

2400997 is a deficient number, since it is larger than the sum of its proper divisors (82823).

2400997 is an equidigital number, since it uses as much as digits as its factorization.

2400997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82822.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 2400997 is about 1549.5150854380. The cubic root of 2400997 is about 133.9051270235.

The spelling of 2400997 in words is "two million, four hundred thousand, nine hundred ninety-seven".