1631424889 has 2 divisors, whose sum is σ = 1631424890. Its totient is φ = 1631424888.

The previous prime is 1631424877. The next prime is 1631424919. The reversal of 1631424889 is 9884241361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1483559289 + 147865600 = 38517^2 + 12160^2 .

It is a cyclic number.

It is not a de Polignac number, because 1631424889 - 2¹³ = 1631416697 is a prime.

It is not a weakly prime, because it can be changed into another prime (1631424689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 815712444 + 815712445.

It is an arithmetic number, because the mean of its divisors is an integer number (815712445).

Almost surely, 2^1631424889 is an apocalyptic number.

It is an amenable number.

1631424889 is a deficient number, since it is larger than the sum of its proper divisors (1).

1631424889 is an equidigital number, since it uses as much as digits as its factorization.

1631424889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 331776, while the sum is 46.

The square root of 1631424889 is about 40390.9010669482. The cubic root of 1631424889 is about 1177.2147487831.

The spelling of 1631424889 in words is "one billion, six hundred thirty-one million, four hundred twenty-four thousand, eight hundred eighty-nine".