8632391 has 2 divisors, whose sum is σ = 8632392. Its totient is φ = 8632390.

The previous prime is 8632387. The next prime is 8632399. The reversal of 8632391 is 1932368.

8632391 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8632391 - 2² = 8632387 is a prime.

It is a Sophie Germain prime.

It is equal to p₅₇₉₄₇₀ and since 8632391 and 579470 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 (8632399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4316195 + 4316196.

It is an arithmetic number, because the mean of its divisors is an integer number (4316196).

Almost surely, 2^8632391 is an apocalyptic number.

8632391 is a deficient number, since it is larger than the sum of its proper divisors (1).

8632391 is an equidigital number, since it uses as much as digits as its factorization.

8632391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 32.

The square root of 8632391 is about 2938.0930890630. The cubic root of 8632391 is about 205.1368588402.

The spelling of 8632391 in words is "eight million, six hundred thirty-two thousand, three hundred ninety-one".