420413431397 has 2 divisors, whose sum is σ = 420413431398. Its totient is φ = 420413431396.

The previous prime is 420413431351. The next prime is 420413431409. The reversal of 420413431397 is 793134314024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 388539042241 + 31874389156 = 623329^2 + 178534^2 .

It is a cyclic number.

It is not a de Polignac number, because 420413431397 - 2²² = 420409237093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420413431307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210206715698 + 210206715699.

It is an arithmetic number, because the mean of its divisors is an integer number (210206715699).

Almost surely, 2^420413431397 is an apocalyptic number.

It is an amenable number.

420413431397 is a deficient number, since it is larger than the sum of its proper divisors (1).

420413431397 is an equidigital number, since it uses as much as digits as its factorization.

420413431397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 41.

The spelling of 420413431397 in words is "four hundred twenty billion, four hundred thirteen million, four hundred thirty-one thousand, three hundred ninety-seven".