396669401 has 2 divisors, whose sum is σ = 396669402. Its totient is φ = 396669400.

The previous prime is 396669323. The next prime is 396669419. The reversal of 396669401 is 104966693.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 363893776 + 32775625 = 19076^2 + 5725^2 .

It is a cyclic number.

It is not a de Polignac number, because 396669401 - 2¹⁸ = 396407257 is a prime.

It is a super-2 number, since 2×396669401² = 314693227379397602, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (396669901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198334700 + 198334701.

It is an arithmetic number, because the mean of its divisors is an integer number (198334701).

Almost surely, 2^396669401 is an apocalyptic number.

It is an amenable number.

396669401 is a deficient number, since it is larger than the sum of its proper divisors (1).

396669401 is an equidigital number, since it uses as much as digits as its factorization.

396669401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 209952, while the sum is 44.

The square root of 396669401 is about 19916.5609732203. The cubic root of 396669401 is about 734.7555921443.

The spelling of 396669401 in words is "three hundred ninety-six million, six hundred sixty-nine thousand, four hundred one".