1631054657 has 2 divisors, whose sum is σ = 1631054658. Its totient is φ = 1631054656.

The previous prime is 1631054653. The next prime is 1631054693. The reversal of 1631054657 is 7564501361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1625783041 + 5271616 = 40321^2 + 2296^2 .

It is a cyclic number.

It is not a de Polignac number, because 1631054657 - 2² = 1631054653 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1631054657.

It is not a weakly prime, because it can be changed into another prime (1631054651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 815527328 + 815527329.

It is an arithmetic number, because the mean of its divisors is an integer number (815527329).

Almost surely, 2^1631054657 is an apocalyptic number.

It is an amenable number.

1631054657 is a deficient number, since it is larger than the sum of its proper divisors (1).

1631054657 is an equidigital number, since it uses as much as digits as its factorization.

1631054657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 75600, while the sum is 38.

The square root of 1631054657 is about 40386.3176954770. The cubic root of 1631054657 is about 1177.1256905315.

The spelling of 1631054657 in words is "one billion, six hundred thirty-one million, fifty-four thousand, six hundred fifty-seven".