1985223907 has 2 divisors, whose sum is σ = 1985223908. Its totient is φ = 1985223906.

The previous prime is 1985223901. The next prime is 1985223923. The reversal of 1985223907 is 7093225891.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1985223907 - 2¹⁵ = 1985191139 is a prime.

It is a super-2 number, since 2×1985223907² = 7882227921848689298, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1985223901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 992611953 + 992611954.

It is an arithmetic number, because the mean of its divisors is an integer number (992611954).

Almost surely, 2^1985223907 is an apocalyptic number.

1985223907 is a deficient number, since it is larger than the sum of its proper divisors (1).

1985223907 is an equidigital number, since it uses as much as digits as its factorization.

1985223907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 272160, while the sum is 46.

The square root of 1985223907 is about 44555.8515461213. The cubic root of 1985223907 is about 1256.8105921021.

The spelling of 1985223907 in words is "one billion, nine hundred eighty-five million, two hundred twenty-three thousand, nine hundred seven".