3630391 has 2 divisors, whose sum is σ = 3630392. Its totient is φ = 3630390.

The previous prime is 3630377. The next prime is 3630397. The reversal of 3630391 is 1930363.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3630391 - 2⁵ = 3630359 is a prime.

It is equal to p₂₅₈₈₀₂ and since 3630391 and 258802 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3630397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1815195 + 1815196.

It is an arithmetic number, because the mean of its divisors is an integer number (1815196).

Almost surely, 2^3630391 is an apocalyptic number.

3630391 is a deficient number, since it is larger than the sum of its proper divisors (1).

3630391 is an equidigital number, since it uses as much as digits as its factorization.

3630391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1458, while the sum is 25.

The square root of 3630391 is about 1905.3584964515. The cubic root of 3630391 is about 153.6919546460.

The spelling of 3630391 in words is "three million, six hundred thirty thousand, three hundred ninety-one".