9723997 has 2 divisors, whose sum is σ = 9723998. Its totient is φ = 9723996.

The previous prime is 9723979. The next prime is 9724021. The reversal of 9723997 is 7993279.

Together with previous prime (9723979) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8444836 + 1279161 = 2906^2 + 1131^2 .

It is a cyclic number.

It is not a de Polignac number, because 9723997 - 2⁷ = 9723869 is a prime.

It is a super-2 number, since 2×9723997² = 189112235312018, which contains 22 as substring.

9723997 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9723907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4861998 + 4861999.

It is an arithmetic number, because the mean of its divisors is an integer number (4861999).

Almost surely, 2^9723997 is an apocalyptic number.

It is an amenable number.

9723997 is a deficient number, since it is larger than the sum of its proper divisors (1).

9723997 is an equidigital number, since it uses as much as digits as its factorization.

9723997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 214326, while the sum is 46.

The square root of 9723997 is about 3118.3324069124. The cubic root of 9723997 is about 213.4428471465.

It can be divided in two parts, 97239 and 97, that added together give a cube (97336 = 46³).

The spelling of 9723997 in words is "nine million, seven hundred twenty-three thousand, nine hundred ninety-seven".