80235691 has 2 divisors, whose sum is σ = 80235692. Its totient is φ = 80235690.

The previous prime is 80235653. The next prime is 80235703. The reversal of 80235691 is 19653208.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 80235691 - 2²¹ = 78138539 is a prime.

It is a super-2 number, since 2×80235691² = 12875532220494962, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (80235091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40117845 + 40117846.

It is an arithmetic number, because the mean of its divisors is an integer number (40117846).

Almost surely, 2^80235691 is an apocalyptic number.

80235691 is a deficient number, since it is larger than the sum of its proper divisors (1).

80235691 is an equidigital number, since it uses as much as digits as its factorization.

80235691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 80235691 is about 8957.4377474811. The cubic root of 80235691 is about 431.3096738539.

Adding to 80235691 its reverse (19653208), we get a palindrome (99888899).

The spelling of 80235691 in words is "eighty million, two hundred thirty-five thousand, six hundred ninety-one".