401794817 has 2 divisors, whose sum is σ = 401794818. Its totient is φ = 401794816.

The previous prime is 401794781. The next prime is 401794823. The reversal of 401794817 is 718497104.

Together with previous prime (401794781) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 212897281 + 188897536 = 14591^2 + 13744^2 .

It is a cyclic number.

It is not a de Polignac number, because 401794817 - 2¹⁶ = 401729281 is a prime.

It is a super-2 number, since 2×401794817² = 322878149936126978, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (401794517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200897408 + 200897409.

It is an arithmetic number, because the mean of its divisors is an integer number (200897409).

Almost surely, 2^401794817 is an apocalyptic number.

It is an amenable number.

401794817 is a deficient number, since it is larger than the sum of its proper divisors (1).

401794817 is an equidigital number, since it uses as much as digits as its factorization.

401794817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56448, while the sum is 41.

The square root of 401794817 is about 20044.8202037334. The cubic root of 401794817 is about 737.9066826043.

The spelling of 401794817 in words is "four hundred one million, seven hundred ninety-four thousand, eight hundred seventeen".