77894691 has 16 divisors (see below), whose sum is σ = 120710400. Its totient is φ = 43756128.

The previous prime is 77894689. The next prime is 77894693. The reversal of 77894691 is 19649877.

It is an interprime number because it is at equal distance from previous prime (77894689) and next prime (77894693).

It is not a de Polignac number, because 77894691 - 2¹ = 77894689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77894693) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30196 + ... + 32673.

It is an arithmetic number, because the mean of its divisors is an integer number (7544400).

Almost surely, 2^77894691 is an apocalyptic number.

77894691 is a deficient number, since it is larger than the sum of its proper divisors (42815709).

77894691 is a wasteful number, since it uses less digits than its factorization.

77894691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62938.

The product of its digits is 762048, while the sum is 51.

The square root of 77894691 is about 8825.7969045294. The cubic root of 77894691 is about 427.0734954947.

The spelling of 77894691 in words is "seventy-seven million, eight hundred ninety-four thousand, six hundred ninety-one".