76943869 has 2 divisors, whose sum is σ = 76943870. Its totient is φ = 76943868.

The previous prime is 76943857. The next prime is 76943879. The reversal of 76943869 is 96834967.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73188025 + 3755844 = 8555^2 + 1938^2 .

It is a cyclic number.

It is not a de Polignac number, because 76943869 - 2⁵ = 76943837 is a prime.

It is a super-2 number, since 2×76943869² = 11840717953378322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (76943849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38471934 + 38471935.

It is an arithmetic number, because the mean of its divisors is an integer number (38471935).

Almost surely, 2^76943869 is an apocalyptic number.

It is an amenable number.

76943869 is a deficient number, since it is larger than the sum of its proper divisors (1).

76943869 is an equidigital number, since it uses as much as digits as its factorization.

76943869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1959552, while the sum is 52.

The square root of 76943869 is about 8771.7654437405. The cubic root of 76943869 is about 425.3286850681.

The spelling of 76943869 in words is "seventy-six million, nine hundred forty-three thousand, eight hundred sixty-nine".