7620391 has 2 divisors, whose sum is σ = 7620392. Its totient is φ = 7620390.

The previous prime is 7620373. The next prime is 7620407. The reversal of 7620391 is 1930267.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 7620391 - 2¹⁵ = 7587623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7620191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3810195 + 3810196.

It is an arithmetic number, because the mean of its divisors is an integer number (3810196).

Almost surely, 2^7620391 is an apocalyptic number.

7620391 is a deficient number, since it is larger than the sum of its proper divisors (1).

7620391 is an equidigital number, since it uses as much as digits as its factorization.

7620391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 7620391 is about 2760.5055696376. The cubic root of 7620391 is about 196.7851936417.

The spelling of 7620391 in words is "seven million, six hundred twenty thousand, three hundred ninety-one".