76143969 has 60 divisors (see below), whose sum is σ = 132670692. Its totient is φ = 43338240.

The previous prime is 76143953. The next prime is 76143971. The reversal of 76143969 is 96934167.

It can be written as a sum of positive squares in 2 ways, for example, as 62726400 + 13417569 = 7920^2 + 3663^2 .

It is not a de Polignac number, because 76143969 - 2⁴ = 76143953 is a prime.

It is a super-2 number, since 2×76143969² = 11595808030145922, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76143269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 166389 + ... + 166845.

Almost surely, 2^76143969 is an apocalyptic number.

It is an amenable number.

76143969 is a deficient number, since it is larger than the sum of its proper divisors (56526723).

76143969 is a wasteful number, since it uses less digits than its factorization.

76143969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508 (or 488 counting only the distinct ones).

The product of its digits is 244944, while the sum is 45.

The square root of 76143969 is about 8726.0511687704. The cubic root of 76143969 is about 423.8496578199.

The spelling of 76143969 in words is "seventy-six million, one hundred forty-three thousand, nine hundred sixty-nine".