1630440739 has 2 divisors, whose sum is σ = 1630440740. Its totient is φ = 1630440738.

The previous prime is 1630440733. The next prime is 1630440821. The reversal of 1630440739 is 9370440361.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1630440739 - 2³ = 1630440731 is a prime.

It is a super-2 number, since 2×1630440739² = 5316674006781732242, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1630440698 and 1630440707.

It is not a weakly prime, because it can be changed into another prime (1630440731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 815220369 + 815220370.

It is an arithmetic number, because the mean of its divisors is an integer number (815220370).

Almost surely, 2^1630440739 is an apocalyptic number.

1630440739 is a deficient number, since it is larger than the sum of its proper divisors (1).

1630440739 is an equidigital number, since it uses as much as digits as its factorization.

1630440739 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 37.

The square root of 1630440739 is about 40378.7164110005. The cubic root of 1630440739 is about 1176.9779846012.

The spelling of 1630440739 in words is "one billion, six hundred thirty million, four hundred forty thousand, seven hundred thirty-nine".