71485979 has 2 divisors, whose sum is σ = 71485980. Its totient is φ = 71485978.

The previous prime is 71485963. The next prime is 71485987. The reversal of 71485979 is 97958417.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71485979 - 2⁴ = 71485963 is a prime.

It is a super-2 number, since 2×71485979² = 10220490387176882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (71485949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35742989 + 35742990.

It is an arithmetic number, because the mean of its divisors is an integer number (35742990).

Almost surely, 2^71485979 is an apocalyptic number.

71485979 is a deficient number, since it is larger than the sum of its proper divisors (1).

71485979 is an equidigital number, since it uses as much as digits as its factorization.

71485979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 635040, while the sum is 50.

The square root of 71485979 is about 8454.9381428843. The cubic root of 71485979 is about 415.0243930114.

The spelling of 71485979 in words is "seventy-one million, four hundred eighty-five thousand, nine hundred seventy-nine".