77987654 has 8 divisors (see below), whose sum is σ = 117138288. Its totient is φ = 38941560.

The previous prime is 77987629. The next prime is 77987659. The reversal of 77987654 is 45678977.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 77987596 and 77987605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77987659) 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, 24242 + ... + 27269.

It is an arithmetic number, because the mean of its divisors is an integer number (14642286).

Almost surely, 2^77987654 is an apocalyptic number.

77987654 is a deficient number, since it is larger than the sum of its proper divisors (39150634).

77987654 is a wasteful number, since it uses less digits than its factorization.

77987654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52270.

The product of its digits is 2963520, while the sum is 53.

The square root of 77987654 is about 8831.0618840545. The cubic root of 77987654 is about 427.2433241410.

The spelling of 77987654 in words is "seventy-seven million, nine hundred eighty-seven thousand, six hundred fifty-four".