400799251 has 2 divisors, whose sum is σ = 400799252. Its totient is φ = 400799250.

The previous prime is 400799237. The next prime is 400799257. The reversal of 400799251 is 152997004.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 400799251 - 2¹³ = 400791059 is a prime.

It is a super-2 number, since 2×400799251² = 321280079204322002, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 400799251.

It is not a weakly prime, because it can be changed into another prime (400799257) 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, 200399625 + 200399626.

It is an arithmetic number, because the mean of its divisors is an integer number (200399626).

Almost surely, 2^400799251 is an apocalyptic number.

400799251 is a deficient number, since it is larger than the sum of its proper divisors (1).

400799251 is an equidigital number, since it uses as much as digits as its factorization.

400799251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 400799251 is about 20019.9713036757. The cubic root of 400799251 is about 737.2967175437.

The spelling of 400799251 in words is "four hundred million, seven hundred ninety-nine thousand, two hundred fifty-one".