420597699791 has 4 divisors (see below), whose sum is σ = 420600170712. Its totient is φ = 420595228872.

The previous prime is 420597699787. The next prime is 420597699827. The reversal of 420597699791 is 197996795024.

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 420597699791 - 2² = 420597699787 is a prime.

It is a super-2 number, since 2×420597699791² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420597699701) 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, 959600 + ... + 1327413.

It is an arithmetic number, because the mean of its divisors is an integer number (105150042678).

Almost surely, 2^420597699791 is an apocalyptic number.

420597699791 is a deficient number, since it is larger than the sum of its proper divisors (2470921).

420597699791 is a wasteful number, since it uses less digits than its factorization.

420597699791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2470920.

The product of its (nonzero) digits is 77157360, while the sum is 68.

The spelling of 420597699791 in words is "four hundred twenty billion, five hundred ninety-seven million, six hundred ninety-nine thousand, seven hundred ninety-one".