420694163 has 2 divisors, whose sum is σ = 420694164. Its totient is φ = 420694162.

The previous prime is 420694129. The next prime is 420694193. The reversal of 420694163 is 361496024.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 420694163 - 2¹⁴ = 420677779 is a prime.

It is a Chen prime.

It is equal to p_22379516 and since 420694163 and 22379516 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (420694103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210347081 + 210347082.

It is an arithmetic number, because the mean of its divisors is an integer number (210347082).

Almost surely, 2^420694163 is an apocalyptic number.

420694163 is the 10964-th centered heptagonal number.

420694163 is a deficient number, since it is larger than the sum of its proper divisors (1).

420694163 is an equidigital number, since it uses as much as digits as its factorization.

420694163 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 420694163 is about 20510.8303829952. The cubic root of 420694163 is about 749.2995908470.

The spelling of 420694163 in words is "four hundred twenty million, six hundred ninety-four thousand, one hundred sixty-three".