420597699827 has 2 divisors, whose sum is σ = 420597699828. Its totient is φ = 420597699826.

The previous prime is 420597699787. The next prime is 420597699829. The reversal of 420597699827 is 728996795024.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420597699827 is a prime.

Together with 420597699829, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (420597699829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210298849913 + 210298849914.

It is an arithmetic number, because the mean of its divisors is an integer number (210298849914).

Almost surely, 2^420597699827 is an apocalyptic number.

420597699827 is a deficient number, since it is larger than the sum of its proper divisors (1).

420597699827 is an equidigital number, since it uses as much as digits as its factorization.

420597699827 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 137168640, while the sum is 68.

The spelling of 420597699827 in words is "four hundred twenty billion, five hundred ninety-seven million, six hundred ninety-nine thousand, eight hundred twenty-seven".