236491397 has 2 divisors, whose sum is σ = 236491398. Its totient is φ = 236491396.

The previous prime is 236491379. The next prime is 236491417. The reversal of 236491397 is 793194632.

Together with previous prime (236491379) 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., 228191236 + 8300161 = 15106^2 + 2881^2 .

It is a cyclic number.

It is not a de Polignac number, because 236491397 - 2²⁰ = 235442821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (236491597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 118245698 + 118245699.

It is an arithmetic number, because the mean of its divisors is an integer number (118245699).

Almost surely, 2^236491397 is an apocalyptic number.

It is an amenable number.

236491397 is a deficient number, since it is larger than the sum of its proper divisors (1).

236491397 is an equidigital number, since it uses as much as digits as its factorization.

236491397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 244944, while the sum is 44.

The square root of 236491397 is about 15378.2767890294. The cubic root of 236491397 is about 618.4032769296.

The spelling of 236491397 in words is "two hundred thirty-six million, four hundred ninety-one thousand, three hundred ninety-seven".