421947579 has 4 divisors (see below), whose sum is σ = 562596776. Its totient is φ = 281298384.

The previous prime is 421947577. The next prime is 421947613. The reversal of 421947579 is 975749124.

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

It is not a de Polignac number, because 421947579 - 2¹ = 421947577 is a prime.

It is a super-2 number, since 2×421947579² = 356079518847922482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421947577) 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, 70324594 + ... + 70324599.

It is an arithmetic number, because the mean of its divisors is an integer number (140649194).

Almost surely, 2^421947579 is an apocalyptic number.

421947579 is a deficient number, since it is larger than the sum of its proper divisors (140649197).

421947579 is a wasteful number, since it uses less digits than its factorization.

421947579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140649196.

The product of its digits is 635040, while the sum is 48.

The square root of 421947579 is about 20541.3626373715. The cubic root of 421947579 is about 750.0430073116.

The spelling of 421947579 in words is "four hundred twenty-one million, nine hundred forty-seven thousand, five hundred seventy-nine".