7977485 has 8 divisors (see below), whose sum is σ = 9668376. Its totient is φ = 6318400.

The previous prime is 7977457. The next prime is 7977503. The reversal of 7977485 is 5847797.

It can be written as a sum of positive squares in 4 ways, for example, as 3575881 + 4401604 = 1891^2 + 2098^2 .

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

It is not a de Polignac number, because 7977485 - 2¹⁰ = 7976461 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7394 + ... + 8403.

It is an arithmetic number, because the mean of its divisors is an integer number (1208547).

Almost surely, 2^7977485 is an apocalyptic number.

It is an amenable number.

7977485 is a deficient number, since it is larger than the sum of its proper divisors (1690891).

7977485 is a wasteful number, since it uses less digits than its factorization.

7977485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15903.

The product of its digits is 493920, while the sum is 47.

The square root of 7977485 is about 2824.4441931113. Note that the first 3 decimals coincide. The cubic root of 7977485 is about 199.8121987086.

The spelling of 7977485 in words is "seven million, nine hundred seventy-seven thousand, four hundred eighty-five".