7930981 has 4 divisors (see below), whose sum is σ = 7945632. Its totient is φ = 7916332.

The previous prime is 7930943. The next prime is 7931003. The reversal of 7930981 is 1890397.

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 7930981 - 2¹¹ = 7928933 is a prime.

It is a super-2 number, since 2×7930981² = 125800919244722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7930981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7934981) 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, 6481 + ... + 7606.

It is an arithmetic number, because the mean of its divisors is an integer number (1986408).

Almost surely, 2^7930981 is an apocalyptic number.

It is an amenable number.

7930981 is a deficient number, since it is larger than the sum of its proper divisors (14651).

7930981 is a wasteful number, since it uses less digits than its factorization.

7930981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14650.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 7930981 is about 2816.1997443363. The cubic root of 7930981 is about 199.4231796575.

It can be divided in two parts, 7930 and 981, that added together give a triangular number (8911 = T₁₃₃).

The spelling of 7930981 in words is "seven million, nine hundred thirty thousand, nine hundred eighty-one".