7405997 has 2 divisors, whose sum is σ = 7405998. Its totient is φ = 7405996.

The previous prime is 7405973. The next prime is 7406011. The reversal of 7405997 is 7995047.

It is a happy number.

7405997 is nontrivially palindromic in base 13.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6295081 + 1110916 = 2509^2 + 1054^2 .

It is an emirp because it is prime and its reverse (7995047) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7405997 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7405927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3702998 + 3702999.

It is an arithmetic number, because the mean of its divisors is an integer number (3702999).

Almost surely, 2^7405997 is an apocalyptic number.

It is an amenable number.

7405997 is a deficient number, since it is larger than the sum of its proper divisors (1).

7405997 is an equidigital number, since it uses as much as digits as its factorization.

7405997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 79380, while the sum is 41.

The square root of 7405997 is about 2721.3961490382. The cubic root of 7405997 is about 194.9221429267.

The spelling of 7405997 in words is "seven million, four hundred five thousand, nine hundred ninety-seven".