7977487 has 8 divisors (see below), whose sum is σ = 9151616. Its totient is φ = 6811992.

The previous prime is 7977457. The next prime is 7977503. The reversal of 7977487 is 7847797.

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 7977487 - 2¹¹ = 7975439 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7977487.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7977457) 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, 33 + ... + 3994.

It is an arithmetic number, because the mean of its divisors is an integer number (1143952).

Almost surely, 2^7977487 is an apocalyptic number.

7977487 is a deficient number, since it is larger than the sum of its proper divisors (1174129).

7977487 is a wasteful number, since it uses less digits than its factorization.

7977487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4317.

The product of its digits is 691488, while the sum is 49.

The square root of 7977487 is about 2824.4445471632. Note that the first 3 decimals coincide. The cubic root of 7977487 is about 199.8122154066.

It can be divided in two parts, 7977 and 487, that added together give a square (8464 = 92²).

The spelling of 7977487 in words is "seven million, nine hundred seventy-seven thousand, four hundred eighty-seven".