80447651 has 2 divisors, whose sum is σ = 80447652. Its totient is φ = 80447650.

The previous prime is 80447623. The next prime is 80447663. The reversal of 80447651 is 15674408.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80447651 is a prime.

It is not a weakly prime, because it can be changed into another prime (80447671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40223825 + 40223826.

It is an arithmetic number, because the mean of its divisors is an integer number (40223826).

Almost surely, 2^80447651 is an apocalyptic number.

80447651 is a deficient number, since it is larger than the sum of its proper divisors (1).

80447651 is an equidigital number, since it uses as much as digits as its factorization.

80447651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 80447651 is about 8969.2614523159. The cubic root of 80447651 is about 431.6891392888.

The spelling of 80447651 in words is "eighty million, four hundred forty-seven thousand, six hundred fifty-one".