400223497 has 2 divisors, whose sum is σ = 400223498. Its totient is φ = 400223496.

The previous prime is 400223479. The next prime is 400223533. The reversal of 400223497 is 794322004.

Together with previous prime (400223479) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 209120521 + 191102976 = 14461^2 + 13824^2 .

It is a cyclic number.

It is not a de Polignac number, because 400223497 - 2²⁷ = 266005769 is a prime.

It is equal to p_21347572 and since 400223497 and 21347572 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 (400223407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200111748 + 200111749.

It is an arithmetic number, because the mean of its divisors is an integer number (200111749).

Almost surely, 2^400223497 is an apocalyptic number.

It is an amenable number.

400223497 is a deficient number, since it is larger than the sum of its proper divisors (1).

400223497 is an equidigital number, since it uses as much as digits as its factorization.

400223497 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 400223497 is about 20005.5866447350. The cubic root of 400223497 is about 736.9435025089.

The spelling of 400223497 in words is "four hundred million, two hundred twenty-three thousand, four hundred ninety-seven".