76949569 has 4 divisors (see below), whose sum is σ = 77178244. Its totient is φ = 76720896.

The previous prime is 76949539. The next prime is 76949573. The reversal of 76949569 is 96594967.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 96594967 = 7 ⋅13799281.

It can be written as a sum of positive squares in 2 ways, for example, as 29160000 + 47789569 = 5400^2 + 6913^2 .

It is a cyclic number.

It is not a de Polignac number, because 76949569 - 2¹³ = 76941377 is a prime.

It is a super-2 number, since 2×76949569² = 11842472338571522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76949539) 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, 113832 + ... + 114505.

It is an arithmetic number, because the mean of its divisors is an integer number (19294561).

Almost surely, 2^76949569 is an apocalyptic number.

It is an amenable number.

76949569 is a deficient number, since it is larger than the sum of its proper divisors (228675).

76949569 is a wasteful number, since it uses less digits than its factorization.

76949569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228674.

The product of its digits is 3674160, while the sum is 55.

The square root of 76949569 is about 8772.0903438120. The cubic root of 76949569 is about 425.3391875885.

The spelling of 76949569 in words is "seventy-six million, nine hundred forty-nine thousand, five hundred sixty-nine".