77387654 has 4 divisors (see below), whose sum is σ = 116081484. Its totient is φ = 38693826.

The previous prime is 77387641. The next prime is 77387671. The reversal of 77387654 is 45678377.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 45678377 = 2179 ⋅20963.

It is a junction number, because it is equal to n+sod(n) for n = 77387599 and 77387608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19346912 + ... + 19346915.

It is an arithmetic number, because the mean of its divisors is an integer number (29020371).

Almost surely, 2^77387654 is an apocalyptic number.

77387654 is a deficient number, since it is larger than the sum of its proper divisors (38693830).

77387654 is a wasteful number, since it uses less digits than its factorization.

77387654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38693829.

The product of its digits is 987840, while the sum is 47.

The square root of 77387654 is about 8797.0252926771. The cubic root of 77387654 is about 426.1448330887.

The spelling of 77387654 in words is "seventy-seven million, three hundred eighty-seven thousand, six hundred fifty-four".