7663731 has 8 divisors (see below), whose sum is σ = 10267584. Its totient is φ = 5084520.

The previous prime is 7663729. The next prime is 7663739. The reversal of 7663731 is 1373667.

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

It is not a de Polignac number, because 7663731 - 2¹ = 7663729 is a prime.

It is a super-2 number, since 2×7663731² = 117465545680722, which contains 22 as substring.

7663731 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 7663692 and 7663701.

It is not an unprimeable number, because it can be changed into a prime (7663739) by changing a digit.

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, 5421 + ... + 6686.

It is an arithmetic number, because the mean of its divisors is an integer number (1283448).

Almost surely, 2^7663731 is an apocalyptic number.

7663731 is a deficient number, since it is larger than the sum of its proper divisors (2603853).

7663731 is a wasteful number, since it uses less digits than its factorization.

7663731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12321.

The product of its digits is 15876, while the sum is 33.

The square root of 7663731 is about 2768.3444511115. The cubic root of 7663731 is about 197.1575521647.

Subtracting from 7663731 its reverse (1373667), we obtain a square (6290064 = 2508²).

The spelling of 7663731 in words is "seven million, six hundred sixty-three thousand, seven hundred thirty-one".