231026387 has 2 divisors, whose sum is σ = 231026388. Its totient is φ = 231026386.

The previous prime is 231026381. The next prime is 231026399. The reversal of 231026387 is 783620132.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231026387 - 2⁴ = 231026371 is a prime.

It is not a weakly prime, because it can be changed into another prime (231026381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115513193 + 115513194.

It is an arithmetic number, because the mean of its divisors is an integer number (115513194).

Almost surely, 2^231026387 is an apocalyptic number.

231026387 is a deficient number, since it is larger than the sum of its proper divisors (1).

231026387 is an equidigital number, since it uses as much as digits as its factorization.

231026387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 231026387 is about 15199.5521973511. The cubic root of 231026387 is about 613.6026060139.

The spelling of 231026387 in words is "two hundred thirty-one million, twenty-six thousand, three hundred eighty-seven".