401430397 has 2 divisors, whose sum is σ = 401430398. Its totient is φ = 401430396.

The previous prime is 401430391. The next prime is 401430451. The reversal of 401430397 is 793034104.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 397643481 + 3786916 = 19941^2 + 1946^2 .

It is a cyclic number.

It is not a de Polignac number, because 401430397 - 2¹⁹ = 400906109 is a prime.

It is a super-2 number, since 2×401430397² = 322292727271155218, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (401430391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200715198 + 200715199.

It is an arithmetic number, because the mean of its divisors is an integer number (200715199).

Almost surely, 2^401430397 is an apocalyptic number.

It is an amenable number.

401430397 is a deficient number, since it is larger than the sum of its proper divisors (1).

401430397 is an equidigital number, since it uses as much as digits as its factorization.

401430397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 401430397 is about 20035.7280127277. The cubic root of 401430397 is about 737.6835261731.

The spelling of 401430397 in words is "four hundred one million, four hundred thirty thousand, three hundred ninety-seven".