1016638631 has 2 divisors, whose sum is σ = 1016638632. Its totient is φ = 1016638630.

The previous prime is 1016638619. The next prime is 1016638657. The reversal of 1016638631 is 1368366101.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1016638631 - 2¹⁰ = 1016637607 is a prime.

It is a super-2 number, since 2×1016638631² = 2067108212083108322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 1016638591 and 1016638600.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1016638031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 508319315 + 508319316.

It is an arithmetic number, because the mean of its divisors is an integer number (508319316).

Almost surely, 2^1016638631 is an apocalyptic number.

1016638631 is a deficient number, since it is larger than the sum of its proper divisors (1).

1016638631 is an equidigital number, since it uses as much as digits as its factorization.

1016638631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 1016638631 is about 31884.7711454857. The cubic root of 1016638631 is about 1005.5157311081.

The spelling of 1016638631 in words is "one billion, sixteen million, six hundred thirty-eight thousand, six hundred thirty-one".