420692969 has 2 divisors, whose sum is σ = 420692970. Its totient is φ = 420692968.

The previous prime is 420692861. The next prime is 420692981. The reversal of 420692969 is 969296024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 374616025 + 46076944 = 19355^2 + 6788^2 .

It is a cyclic number.

It is not a de Polignac number, because 420692969 - 2²⁸ = 152257513 is a prime.

It is a super-2 number, since 2×420692969² = 353965148332069922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (420692269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210346484 + 210346485.

It is an arithmetic number, because the mean of its divisors is an integer number (210346485).

Almost surely, 2^420692969 is an apocalyptic number.

It is an amenable number.

420692969 is a deficient number, since it is larger than the sum of its proper divisors (1).

420692969 is an equidigital number, since it uses as much as digits as its factorization.

420692969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 419904, while the sum is 47.

The square root of 420692969 is about 20510.8012764007. The cubic root of 420692969 is about 749.2988819674.

The spelling of 420692969 in words is "four hundred twenty million, six hundred ninety-two thousand, nine hundred sixty-nine".