997622239 has 2 divisors, whose sum is σ = 997622240. Its totient is φ = 997622238.

The previous prime is 997622201. The next prime is 997622251. The reversal of 997622239 is 932226799.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 997622239 - 2¹¹ = 997620191 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 997622192 and 997622201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (997622279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498811119 + 498811120.

It is an arithmetic number, because the mean of its divisors is an integer number (498811120).

Almost surely, 2^997622239 is an apocalyptic number.

997622239 is a deficient number, since it is larger than the sum of its proper divisors (1).

997622239 is an equidigital number, since it uses as much as digits as its factorization.

997622239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 734832, while the sum is 49.

The square root of 997622239 is about 31585.1585242183. The cubic root of 997622239 is about 999.2067839747.

The spelling of 997622239 in words is "nine hundred ninety-seven million, six hundred twenty-two thousand, two hundred thirty-nine".