7642987 has 8 divisors (see below), whose sum is σ = 8404992. Its totient is φ = 6892200.

The previous prime is 7642963. The next prime is 7643017. The reversal of 7642987 is 7892467.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7642987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7642487) 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, 1339 + ... + 4132.

It is an arithmetic number, because the mean of its divisors is an integer number (1050624).

Almost surely, 2^7642987 is an apocalyptic number.

7642987 is a deficient number, since it is larger than the sum of its proper divisors (762005).

7642987 is a wasteful number, since it uses less digits than its factorization.

7642987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5609.

The product of its digits is 169344, while the sum is 43.

The square root of 7642987 is about 2764.5952687509. The cubic root of 7642987 is about 196.9795043396.

The spelling of 7642987 in words is "seven million, six hundred forty-two thousand, nine hundred eighty-seven".