591420631 has 2 divisors, whose sum is σ = 591420632. Its totient is φ = 591420630.

The previous prime is 591420629. The next prime is 591420649. The reversal of 591420631 is 136024195.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 591420631 - 2¹ = 591420629 is a prime.

It is a super-2 number, since 2×591420631² = 699556725544876322, which contains 22 as substring.

Together with 591420629, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 591420593 and 591420602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (591420601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 295710315 + 295710316.

It is an arithmetic number, because the mean of its divisors is an integer number (295710316).

Almost surely, 2^591420631 is an apocalyptic number.

591420631 is a deficient number, since it is larger than the sum of its proper divisors (1).

591420631 is an equidigital number, since it uses as much as digits as its factorization.

591420631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 591420631 is about 24319.1412471740. The cubic root of 591420631 is about 839.3932840139.

The spelling of 591420631 in words is "five hundred ninety-one million, four hundred twenty thousand, six hundred thirty-one".