400892161 has 2 divisors, whose sum is σ = 400892162. Its totient is φ = 400892160.

The previous prime is 400892123. The next prime is 400892179. The reversal of 400892161 is 161298004.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 363131136 + 37761025 = 19056^2 + 6145^2 .

It is a cyclic number.

It is not a de Polignac number, because 400892161 - 2⁹ = 400891649 is a prime.

It is not a weakly prime, because it can be changed into another prime (400892101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200446080 + 200446081.

It is an arithmetic number, because the mean of its divisors is an integer number (200446081).

Almost surely, 2^400892161 is an apocalyptic number.

It is an amenable number.

400892161 is a deficient number, since it is larger than the sum of its proper divisors (1).

400892161 is an equidigital number, since it uses as much as digits as its factorization.

400892161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 400892161 is about 20022.2916021119. The cubic root of 400892161 is about 737.3536845044.

It can be divided in two parts, 4008 and 92161, that added together give a palindrome (96169).

The spelling of 400892161 in words is "four hundred million, eight hundred ninety-two thousand, one hundred sixty-one".