77482891 has 4 divisors (see below), whose sum is σ = 77500984. Its totient is φ = 77464800.

The previous prime is 77482879. The next prime is 77482897. The reversal of 77482891 is 19828477.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 77482891 - 2¹⁵ = 77450123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77482897) 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, 1396 + ... + 12526.

It is an arithmetic number, because the mean of its divisors is an integer number (19375246).

Almost surely, 2^77482891 is an apocalyptic number.

77482891 is a deficient number, since it is larger than the sum of its proper divisors (18093).

77482891 is a wasteful number, since it uses less digits than its factorization.

77482891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18092.

The product of its digits is 225792, while the sum is 46.

The square root of 77482891 is about 8802.4366512915. The cubic root of 77482891 is about 426.3195729265.

The spelling of 77482891 in words is "seventy-seven million, four hundred eighty-two thousand, eight hundred ninety-one".