421573699 has 2 divisors, whose sum is σ = 421573700. Its totient is φ = 421573698.

The previous prime is 421573661. The next prime is 421573723. The reversal of 421573699 is 996375124.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 421573699 - 2⁷ = 421573571 is a prime.

It is not a weakly prime, because it can be changed into another prime (421573639) 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, 210786849 + 210786850.

It is an arithmetic number, because the mean of its divisors is an integer number (210786850).

Almost surely, 2^421573699 is an apocalyptic number.

421573699 is a deficient number, since it is larger than the sum of its proper divisors (1).

421573699 is an equidigital number, since it uses as much as digits as its factorization.

421573699 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 408240, while the sum is 46.

The square root of 421573699 is about 20532.2599584167. The cubic root of 421573699 is about 749.8214087362.

The spelling of 421573699 in words is "four hundred twenty-one million, five hundred seventy-three thousand, six hundred ninety-nine".