71980099 has 2 divisors, whose sum is σ = 71980100. Its totient is φ = 71980098.

The previous prime is 71980093. The next prime is 71980121. The reversal of 71980099 is 99008917.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71980099 - 2⁵ = 71980067 is a prime.

It is a super-2 number, since 2×71980099² = 10362269304099602, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (71980093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35990049 + 35990050.

It is an arithmetic number, because the mean of its divisors is an integer number (35990050).

Almost surely, 2^71980099 is an apocalyptic number.

71980099 is a deficient number, since it is larger than the sum of its proper divisors (1).

71980099 is an equidigital number, since it uses as much as digits as its factorization.

71980099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 43.

The square root of 71980099 is about 8484.1086155235. The cubic root of 71980099 is about 415.9784316819.

The spelling of 71980099 in words is "seventy-one million, nine hundred eighty thousand, ninety-nine".