421018797 has 4 divisors (see below), whose sum is σ = 561358400. Its totient is φ = 280679196.

The previous prime is 421018757. The next prime is 421018799. The reversal of 421018797 is 797810124.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 421018797 - 2⁷ = 421018669 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 (421018799) 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, 70169797 + ... + 70169802.

It is an arithmetic number, because the mean of its divisors is an integer number (140339600).

Almost surely, 2^421018797 is an apocalyptic number.

It is an amenable number.

421018797 is a deficient number, since it is larger than the sum of its proper divisors (140339603).

421018797 is a wasteful number, since it uses less digits than its factorization.

421018797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140339602.

The product of its (nonzero) digits is 28224, while the sum is 39.

The square root of 421018797 is about 20518.7425784330. The cubic root of 421018797 is about 749.4922768116.

The spelling of 421018797 in words is "four hundred twenty-one million, eighteen thousand, seven hundred ninety-seven".