76850991 has 32 divisors (see below), whose sum is σ = 136972800. Its totient is φ = 41601600.

The previous prime is 76850989. The next prime is 76851011. The reversal of 76850991 is 19905867.

It is not a de Polignac number, because 76850991 - 2¹ = 76850989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76850941) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7110 + ... + 14291.

It is an arithmetic number, because the mean of its divisors is an integer number (4280400).

Almost surely, 2^76850991 is an apocalyptic number.

76850991 is a deficient number, since it is larger than the sum of its proper divisors (60121809).

76850991 is a wasteful number, since it uses less digits than its factorization.

76850991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21436 (or 21430 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 45.

The square root of 76850991 is about 8766.4696999419. The cubic root of 76850991 is about 425.1574798177.

It can be divided in two parts, 76850 and 991, that added together give a square (77841 = 279²).

The spelling of 76850991 in words is "seventy-six million, eight hundred fifty thousand, nine hundred ninety-one".