1630856867 has 2 divisors, whose sum is σ = 1630856868. Its totient is φ = 1630856866.

The previous prime is 1630856863. The next prime is 1630856873. The reversal of 1630856867 is 7686580361.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1630856867 - 2² = 1630856863 is a prime.

It is not a weakly prime, because it can be changed into another prime (1630856863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 815428433 + 815428434.

It is an arithmetic number, because the mean of its divisors is an integer number (815428434).

Almost surely, 2^1630856867 is an apocalyptic number.

1630856867 is a deficient number, since it is larger than the sum of its proper divisors (1).

1630856867 is an equidigital number, since it uses as much as digits as its factorization.

1630856867 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1451520, while the sum is 50.

The square root of 1630856867 is about 40383.8688958847. The cubic root of 1630856867 is about 1177.0781071880.

The spelling of 1630856867 in words is "one billion, six hundred thirty million, eight hundred fifty-six thousand, eight hundred sixty-seven".