5431661 has 2 divisors, whose sum is σ = 5431662. Its totient is φ = 5431660.

The previous prime is 5431627. The next prime is 5431691. The reversal of 5431661 is 1661345.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5175625 + 256036 = 2275^2 + 506^2 .

It is a cyclic number.

It is not a de Polignac number, because 5431661 - 2⁶ = 5431597 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 5431661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5431691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2715830 + 2715831.

It is an arithmetic number, because the mean of its divisors is an integer number (2715831).

Almost surely, 2^5431661 is an apocalyptic number.

It is an amenable number.

5431661 is a deficient number, since it is larger than the sum of its proper divisors (1).

5431661 is an equidigital number, since it uses as much as digits as its factorization.

5431661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160, while the sum is 26.

The square root of 5431661 is about 2330.5924139583. The cubic root of 5431661 is about 175.7832753340.

The spelling of 5431661 in words is "five million, four hundred thirty-one thousand, six hundred sixty-one".