7775997 has 8 divisors (see below), whose sum is σ = 10913760. Its totient is φ = 4911120.

The previous prime is 7775981. The next prime is 7776059. The reversal of 7775997 is 7995777.

It is a happy number.

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

It is not a de Polignac number, because 7775997 - 2⁴ = 7775981 is a prime.

It is a super-2 number, since 2×7775997² = 120932258688018, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7775497) 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, 68154 + ... + 68267.

It is an arithmetic number, because the mean of its divisors is an integer number (1364220).

Almost surely, 2^7775997 is an apocalyptic number.

It is an amenable number.

7775997 is a deficient number, since it is larger than the sum of its proper divisors (3137763).

7775997 is a wasteful number, since it uses less digits than its factorization.

7775997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136443.

The product of its digits is 972405, while the sum is 51.

The square root of 7775997 is about 2788.5474713549. The cubic root of 7775997 is about 198.1156094558.

The spelling of 7775997 in words is "seven million, seven hundred seventy-five thousand, nine hundred ninety-seven".