421994079 has 24 divisors (see below), whose sum is σ = 660095072. Its totient is φ = 258240960.

The previous prime is 421994071. The next prime is 421994081. The reversal of 421994079 is 970499124.

It is a happy number.

It is not a de Polignac number, because 421994079 - 2³ = 421994071 is a prime.

It is a super-2 number, since 2×421994079² = 356158005422116482, which contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421994071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11214 + ... + 31140.

Almost surely, 2^421994079 is an apocalyptic number.

421994079 is a deficient number, since it is larger than the sum of its proper divisors (238100993).

421994079 is a wasteful number, since it uses less digits than its factorization.

421994079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20127 (or 20124 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The square root of 421994079 is about 20542.4944687835. The cubic root of 421994079 is about 750.0705586951.

The spelling of 421994079 in words is "four hundred twenty-one million, nine hundred ninety-four thousand, seventy-nine".