233421691 has 2 divisors, whose sum is σ = 233421692. Its totient is φ = 233421690.

The previous prime is 233421619. The next prime is 233421697. The reversal of 233421691 is 196124332.

Together with previous prime (233421619) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 233421691 - 2¹⁷ = 233290619 is a prime.

It is not a weakly prime, because it can be changed into another prime (233421697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 116710845 + 116710846.

It is an arithmetic number, because the mean of its divisors is an integer number (116710846).

Almost surely, 2^233421691 is an apocalyptic number.

233421691 is a deficient number, since it is larger than the sum of its proper divisors (1).

233421691 is an equidigital number, since it uses as much as digits as its factorization.

233421691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 31.

The square root of 233421691 is about 15278.1442263123. The cubic root of 233421691 is about 615.7159494272.

It can be divided in two parts, 2334 and 21691, that added together give a square (24025 = 155²).

The spelling of 233421691 in words is "two hundred thirty-three million, four hundred twenty-one thousand, six hundred ninety-one".