2503997 has 2 divisors, whose sum is σ = 2503998. Its totient is φ = 2503996.

The previous prime is 2503979. The next prime is 2503999. The reversal of 2503997 is 7993052.

Together with previous prime (2503979) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1378276 + 1125721 = 1174^2 + 1061^2 .

It is a cyclic number.

It is not a de Polignac number, because 2503997 - 2¹⁶ = 2438461 is a prime.

Together with 2503999, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2503999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1251998 + 1251999.

It is an arithmetic number, because the mean of its divisors is an integer number (1251999).

2^2503997 is an apocalyptic number.

It is an amenable number.

2503997 is a deficient number, since it is larger than the sum of its proper divisors (1).

2503997 is an equidigital number, since it uses as much as digits as its factorization.

2503997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17010, while the sum is 35.

The square root of 2503997 is about 1582.4022876627. The cubic root of 2503997 is about 135.7931724982.

The spelling of 2503997 in words is "two million, five hundred three thousand, nine hundred ninety-seven".