421309597 has 2 divisors, whose sum is σ = 421309598. Its totient is φ = 421309596.

The previous prime is 421309583. The next prime is 421309613. The reversal of 421309597 is 795903124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 350850361 + 70459236 = 18731^2 + 8394^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421309597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421309507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210654798 + 210654799.

It is an arithmetic number, because the mean of its divisors is an integer number (210654799).

Almost surely, 2^421309597 is an apocalyptic number.

It is an amenable number.

421309597 is a deficient number, since it is larger than the sum of its proper divisors (1).

421309597 is an equidigital number, since it uses as much as digits as its factorization.

421309597 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 421309597 is about 20525.8275594432. The cubic root of 421309597 is about 749.6647965776.

The spelling of 421309597 in words is "four hundred twenty-one million, three hundred nine thousand, five hundred ninety-seven".