71386769 has 4 divisors (see below), whose sum is σ = 73689600. Its totient is φ = 69083940.

The previous prime is 71386739. The next prime is 71386787. The reversal of 71386769 is 96768317.

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: 96768317 = 167 ⋅579451.

It is a cyclic number.

It is not a de Polignac number, because 71386769 - 2¹² = 71382673 is a prime.

It is a super-2 number, since 2×71386769² = 10192141576518722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71386709) 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, 1151369 + ... + 1151430.

It is an arithmetic number, because the mean of its divisors is an integer number (18422400).

Almost surely, 2^71386769 is an apocalyptic number.

It is an amenable number.

71386769 is a deficient number, since it is larger than the sum of its proper divisors (2302831).

71386769 is a wasteful number, since it uses less digits than its factorization.

71386769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2302830.

The product of its digits is 381024, while the sum is 47.

The square root of 71386769 is about 8449.0691203233. The cubic root of 71386769 is about 414.8323104380.

The spelling of 71386769 in words is "seventy-one million, three hundred eighty-six thousand, seven hundred sixty-nine".