80121623 has 2 divisors, whose sum is σ = 80121624. Its totient is φ = 80121622.

The previous prime is 80121619. The next prime is 80121647. The reversal of 80121623 is 32612108.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 80121623 - 2² = 80121619 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80121023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40060811 + 40060812.

It is an arithmetic number, because the mean of its divisors is an integer number (40060812).

Almost surely, 2^80121623 is an apocalyptic number.

80121623 is a deficient number, since it is larger than the sum of its proper divisors (1).

80121623 is an equidigital number, since it uses as much as digits as its factorization.

80121623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 80121623 is about 8951.0682602693. The cubic root of 80121623 is about 431.1051847864.

The spelling of 80121623 in words is "eighty million, one hundred twenty-one thousand, six hundred twenty-three".