71761869 has 20 divisors (see below), whose sum is σ = 110661760. Its totient is φ = 46296360.

The previous prime is 71761867. The next prime is 71761871. The reversal of 71761869 is 96816717.

It is an interprime number because it is at equal distance from previous prime (71761867) and next prime (71761871).

It is not a de Polignac number, because 71761869 - 2¹ = 71761867 is a prime.

It is a super-2 number, since 2×71761869² = 10299531684746322, 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 (71761867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 11779 + ... + 16800.

It is an arithmetic number, because the mean of its divisors is an integer number (5533088).

Almost surely, 2^71761869 is an apocalyptic number.

It is an amenable number.

71761869 is a deficient number, since it is larger than the sum of its proper divisors (38899891).

71761869 is a wasteful number, since it uses less digits than its factorization.

71761869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28622 (or 28613 counting only the distinct ones).

The product of its digits is 127008, while the sum is 45.

The square root of 71761869 is about 8471.2377489951. The cubic root of 71761869 is about 415.5576168976.

It can be divided in two parts, 7176 and 1869, that added together give a triangular number (9045 = T₁₃₄).

The spelling of 71761869 in words is "seventy-one million, seven hundred sixty-one thousand, eight hundred sixty-nine".