71986077 has 24 divisors (see below), whose sum is σ = 109680480. Its totient is φ = 47167920.

The previous prime is 71986063. The next prime is 71986081. The reversal of 71986077 is 77068917.

It is a happy number.

It is not a de Polignac number, because 71986077 - 2⁸ = 71985821 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71986027) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11827 + ... + 16847.

It is an arithmetic number, because the mean of its divisors is an integer number (4570020).

Almost surely, 2^71986077 is an apocalyptic number.

It is an amenable number.

71986077 is a deficient number, since it is larger than the sum of its proper divisors (37694403).

71986077 is an equidigital number, since it uses as much as digits as its factorization.

71986077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5095 (or 5083 counting only the distinct ones).

The product of its (nonzero) digits is 148176, while the sum is 45.

The square root of 71986077 is about 8484.4609139297. The cubic root of 71986077 is about 415.9899471344.

The spelling of 71986077 in words is "seventy-one million, nine hundred eighty-six thousand, seventy-seven".