400343101 has 2 divisors, whose sum is σ = 400343102. Its totient is φ = 400343100.

The previous prime is 400343077. The next prime is 400343117. The reversal of 400343101 is 101343004.

It is an a-pointer prime, because the next prime (400343117) can be obtained adding 400343101 to its sum of digits (16).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 310112100 + 90231001 = 17610^2 + 9499^2 .

It is a cyclic number.

It is not a de Polignac number, because 400343101 - 2²¹ = 398245949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400343131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200171550 + 200171551.

It is an arithmetic number, because the mean of its divisors is an integer number (200171551).

Almost surely, 2^400343101 is an apocalyptic number.

It is an amenable number.

400343101 is a deficient number, since it is larger than the sum of its proper divisors (1).

400343101 is an equidigital number, since it uses as much as digits as its factorization.

400343101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 400343101 is about 20008.5756864401. The cubic root of 400343101 is about 737.0169053389.

Adding to 400343101 its reverse (101343004), we get a palindrome (501686105).

The spelling of 400343101 in words is "four hundred million, three hundred forty-three thousand, one hundred one".