421195399 has 4 divisors (see below), whose sum is σ = 429142536. Its totient is φ = 413248264.

The previous prime is 421195387. The next prime is 421195469. The reversal of 421195399 is 993591124.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 421195399 - 2⁵ = 421195367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421195339) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3973489 + ... + 3973594.

It is an arithmetic number, because the mean of its divisors is an integer number (107285634).

Almost surely, 2^421195399 is an apocalyptic number.

421195399 is a deficient number, since it is larger than the sum of its proper divisors (7947137).

421195399 is an equidigital number, since it uses as much as digits as its factorization.

421195399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7947136.

The product of its digits is 87480, while the sum is 43.

The square root of 421195399 is about 20523.0455585910. The cubic root of 421195399 is about 749.5970570362.

The spelling of 421195399 in words is "four hundred twenty-one million, one hundred ninety-five thousand, three hundred ninety-nine".