71336989 has 4 divisors (see below), whose sum is σ = 71355424. Its totient is φ = 71318556.

The previous prime is 71336953. The next prime is 71337011. The reversal of 71336989 is 98963317.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 98963317 = 8053 ⋅12289.

It is a cyclic number.

It is not a de Polignac number, because 71336989 - 2¹³ = 71328797 is a prime.

It is a super-2 number, since 2×71336989² = 10177931999172242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71336939) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 927 + ... + 11980.

It is an arithmetic number, because the mean of its divisors is an integer number (17838856).

Almost surely, 2^71336989 is an apocalyptic number.

It is an amenable number.

71336989 is a deficient number, since it is larger than the sum of its proper divisors (18435).

71336989 is a wasteful number, since it uses less digits than its factorization.

71336989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18434.

The product of its digits is 244944, while the sum is 46.

The square root of 71336989 is about 8446.1227199230. The cubic root of 71336989 is about 414.7358632738.

The spelling of 71336989 in words is "seventy-one million, three hundred thirty-six thousand, nine hundred eighty-nine".