77487487 has 8 divisors (see below), whose sum is σ = 96607872. Its totient is φ = 60379800.

The previous prime is 77487481. The next prime is 77487497. The reversal of 77487487 is 78478477.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 77487487 - 2⁷ = 77487359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77487481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 503089 + ... + 503242.

It is an arithmetic number, because the mean of its divisors is an integer number (12075984).

Almost surely, 2^77487487 is an apocalyptic number.

77487487 is a gapful number since it is divisible by the number (77) formed by its first and last digit.

77487487 is a deficient number, since it is larger than the sum of its proper divisors (19120385).

77487487 is a wasteful number, since it uses less digits than its factorization.

77487487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1006349.

The product of its digits is 2458624, while the sum is 52.

The square root of 77487487 is about 8802.6977114973. The cubic root of 77487487 is about 426.3280019960.

The spelling of 77487487 in words is "seventy-seven million, four hundred eighty-seven thousand, four hundred eighty-seven".