420933897431 has 2 divisors, whose sum is σ = 420933897432. Its totient is φ = 420933897430.

The previous prime is 420933897427. The next prime is 420933897443. The reversal of 420933897431 is 134798339024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 420933897431 - 2² = 420933897427 is a prime.

It is a super-2 number, since 2×420933897431² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420933897031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210466948715 + 210466948716.

It is an arithmetic number, because the mean of its divisors is an integer number (210466948716).

Almost surely, 2^420933897431 is an apocalyptic number.

420933897431 is a deficient number, since it is larger than the sum of its proper divisors (1).

420933897431 is an equidigital number, since it uses as much as digits as its factorization.

420933897431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3919104, while the sum is 53.

The spelling of 420933897431 in words is "four hundred twenty billion, nine hundred thirty-three million, eight hundred ninety-seven thousand, four hundred thirty-one".