80436623 has 2 divisors, whose sum is σ = 80436624. Its totient is φ = 80436622.

The previous prime is 80436619. The next prime is 80436637. The reversal of 80436623 is 32663408.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 80436623 - 2² = 80436619 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 80436623.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80436683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40218311 + 40218312.

It is an arithmetic number, because the mean of its divisors is an integer number (40218312).

Almost surely, 2^80436623 is an apocalyptic number.

80436623 is a deficient number, since it is larger than the sum of its proper divisors (1).

80436623 is an equidigital number, since it uses as much as digits as its factorization.

80436623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 80436623 is about 8968.6466649099. The cubic root of 80436623 is about 431.6694126495.

The spelling of 80436623 in words is "eighty million, four hundred thirty-six thousand, six hundred twenty-three".