80861747 has 2 divisors, whose sum is σ = 80861748. Its totient is φ = 80861746.

The previous prime is 80861743. The next prime is 80861749. The reversal of 80861747 is 74716808.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 80861747 - 2² = 80861743 is a prime.

Together with 80861749, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (80861743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40430873 + 40430874.

It is an arithmetic number, because the mean of its divisors is an integer number (40430874).

Almost surely, 2^80861747 is an apocalyptic number.

80861747 is a deficient number, since it is larger than the sum of its proper divisors (1).

80861747 is an equidigital number, since it uses as much as digits as its factorization.

80861747 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 75264, while the sum is 41.

The square root of 80861747 is about 8992.3159975615. The cubic root of 80861747 is about 432.4285638305.

The spelling of 80861747 in words is "eighty million, eight hundred sixty-one thousand, seven hundred forty-seven".