80951971 has 2 divisors, whose sum is σ = 80951972. Its totient is φ = 80951970.

The previous prime is 80951947. The next prime is 80952017. The reversal of 80951971 is 17915908.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 80951971 - 2⁵ = 80951939 is a prime.

It is not a weakly prime, because it can be changed into another prime (80951911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40475985 + 40475986.

It is an arithmetic number, because the mean of its divisors is an integer number (40475986).

Almost surely, 2^80951971 is an apocalyptic number.

80951971 is a deficient number, since it is larger than the sum of its proper divisors (1).

80951971 is an equidigital number, since it uses as much as digits as its factorization.

80951971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 40.

The square root of 80951971 is about 8997.3313265657. The cubic root of 80951971 is about 432.5893359066.

The spelling of 80951971 in words is "eighty million, nine hundred fifty-one thousand, nine hundred seventy-one".