7403987 has 2 divisors, whose sum is σ = 7403988. Its totient is φ = 7403986.

The previous prime is 7403971. The next prime is 7404029. The reversal of 7403987 is 7893047.

It is a weak prime.

It is an emirp because it is prime and its reverse (7893047) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7403987 - 2⁴ = 7403971 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7403987.

It is not a weakly prime, because it can be changed into another prime (7403917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3701993 + 3701994.

It is an arithmetic number, because the mean of its divisors is an integer number (3701994).

Almost surely, 2^7403987 is an apocalyptic number.

7403987 is a deficient number, since it is larger than the sum of its proper divisors (1).

7403987 is an equidigital number, since it uses as much as digits as its factorization.

7403987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42336, while the sum is 38.

The square root of 7403987 is about 2721.0268282397. The cubic root of 7403987 is about 194.9045072657.

The spelling of 7403987 in words is "seven million, four hundred three thousand, nine hundred eighty-seven".