400848397 has 2 divisors, whose sum is σ = 400848398. Its totient is φ = 400848396.

The previous prime is 400848391. The next prime is 400848433. The reversal of 400848397 is 793848004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 389430756 + 11417641 = 19734^2 + 3379^2 .

It is a cyclic number.

It is not a de Polignac number, because 400848397 - 2¹⁵ = 400815629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400848391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200424198 + 200424199.

It is an arithmetic number, because the mean of its divisors is an integer number (200424199).

Almost surely, 2^400848397 is an apocalyptic number.

It is an amenable number.

400848397 is a deficient number, since it is larger than the sum of its proper divisors (1).

400848397 is an equidigital number, since it uses as much as digits as its factorization.

400848397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 193536, while the sum is 43.

The square root of 400848397 is about 20021.1986903881. The cubic root of 400848397 is about 737.3268520840.

The spelling of 400848397 in words is "four hundred million, eight hundred forty-eight thousand, three hundred ninety-seven".