7550981 has 2 divisors, whose sum is σ = 7550982. Its totient is φ = 7550980.

The previous prime is 7550957. The next prime is 7550987. The reversal of 7550981 is 1890557.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7480225 + 70756 = 2735^2 + 266^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7550981 is a prime.

It is a super-2 number, since 2×7550981² = 114034628124722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7550987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3775490 + 3775491.

It is an arithmetic number, because the mean of its divisors is an integer number (3775491).

Almost surely, 2^7550981 is an apocalyptic number.

It is an amenable number.

7550981 is a deficient number, since it is larger than the sum of its proper divisors (1).

7550981 is an equidigital number, since it uses as much as digits as its factorization.

7550981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12600, while the sum is 35.

The square root of 7550981 is about 2747.9048382359. The cubic root of 7550981 is about 196.1859006045.

The spelling of 7550981 in words is "seven million, five hundred fifty thousand, nine hundred eighty-one".