7636981 has 4 divisors (see below), whose sum is σ = 8331264. Its totient is φ = 6942700.

The previous prime is 7636963. The next prime is 7636997. The reversal of 7636981 is 1896367.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7636981 - 2⁵ = 7636949 is a prime.

It is a super-2 number, since 2×7636981² = 116646957588722, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7636931) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 347125 + ... + 347146.

It is an arithmetic number, because the mean of its divisors is an integer number (2082816).

Almost surely, 2^7636981 is an apocalyptic number.

It is an amenable number.

7636981 is a deficient number, since it is larger than the sum of its proper divisors (694283).

7636981 is a wasteful number, since it uses less digits than its factorization.

7636981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 694282.

The product of its digits is 54432, while the sum is 40.

The square root of 7636981 is about 2763.5088203225. The cubic root of 7636981 is about 196.9278941106.

It can be divided in two parts, 763 and 6981, that added together give a square (7744 = 88²).

The spelling of 7636981 in words is "seven million, six hundred thirty-six thousand, nine hundred eighty-one".