1630040437 has 2 divisors, whose sum is σ = 1630040438. Its totient is φ = 1630040436.

The previous prime is 1630040369. The next prime is 1630040443. The reversal of 1630040437 is 7340400361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1535542596 + 94497841 = 39186^2 + 9721^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1630040437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1630040537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 815020218 + 815020219.

It is an arithmetic number, because the mean of its divisors is an integer number (815020219).

Almost surely, 2^1630040437 is an apocalyptic number.

It is an amenable number.

1630040437 is a deficient number, since it is larger than the sum of its proper divisors (1).

1630040437 is an equidigital number, since it uses as much as digits as its factorization.

1630040437 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 28.

The square root of 1630040437 is about 40373.7592626696. The cubic root of 1630040437 is about 1176.8816537557.

Adding to 1630040437 its reverse (7340400361), we get a palindrome (8970440798).

The spelling of 1630040437 in words is "one billion, six hundred thirty million, forty thousand, four hundred thirty-seven".