23478397 has 2 divisors, whose sum is σ = 23478398. Its totient is φ = 23478396.

The previous prime is 23478379. The next prime is 23478419. The reversal of 23478397 is 79387432.

Together with previous prime (23478379) 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., 17397241 + 6081156 = 4171^2 + 2466^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23478397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23478307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11739198 + 11739199.

It is an arithmetic number, because the mean of its divisors is an integer number (11739199).

Almost surely, 2^23478397 is an apocalyptic number.

It is an amenable number.

23478397 is a deficient number, since it is larger than the sum of its proper divisors (1).

23478397 is an equidigital number, since it uses as much as digits as its factorization.

23478397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 254016, while the sum is 43.

The square root of 23478397 is about 4845.4511657843. The cubic root of 23478397 is about 286.3449185930.

The spelling of 23478397 in words is "twenty-three million, four hundred seventy-eight thousand, three hundred ninety-seven".