997627951 has 2 divisors, whose sum is σ = 997627952. Its totient is φ = 997627950.

The previous prime is 997627919. The next prime is 997627963. The reversal of 997627951 is 159726799.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 997627951 - 2⁵ = 997627919 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 997627892 and 997627901.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (997627051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498813975 + 498813976.

It is an arithmetic number, because the mean of its divisors is an integer number (498813976).

Almost surely, 2^997627951 is an apocalyptic number.

997627951 is a deficient number, since it is larger than the sum of its proper divisors (1).

997627951 is an equidigital number, since it uses as much as digits as its factorization.

997627951 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2143260, while the sum is 55.

The square root of 997627951 is about 31585.2489463040. The cubic root of 997627951 is about 999.2086909952.

The spelling of 997627951 in words is "nine hundred ninety-seven million, six hundred twenty-seven thousand, nine hundred fifty-one".