421097659 has 2 divisors, whose sum is σ = 421097660. Its totient is φ = 421097658.

The previous prime is 421097647. The next prime is 421097669. The reversal of 421097659 is 956790124.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 421097659 - 2¹³ = 421089467 is a prime.

It is equal to p_22399792 and since 421097659 and 22399792 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (421097669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210548829 + 210548830.

It is an arithmetic number, because the mean of its divisors is an integer number (210548830).

Almost surely, 2^421097659 is an apocalyptic number.

421097659 is a deficient number, since it is larger than the sum of its proper divisors (1).

421097659 is an equidigital number, since it uses as much as digits as its factorization.

421097659 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 421097659 is about 20520.6641949036. The cubic root of 421097659 is about 749.5390702646.

The spelling of 421097659 in words is "four hundred twenty-one million, ninety-seven thousand, six hundred fifty-nine".