5497981 has 4 divisors (see below), whose sum is σ = 5549472. Its totient is φ = 5446492.

The previous prime is 5497979. The next prime is 5497993. The reversal of 5497981 is 1897945.

5497981 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 5497981 - 2¹ = 5497979 is a prime.

It is a super-2 number, since 2×5497981² = 60455590152722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5497901) 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, 25585 + ... + 25798.

It is an arithmetic number, because the mean of its divisors is an integer number (1387368).

Almost surely, 2^5497981 is an apocalyptic number.

It is an amenable number.

5497981 is a deficient number, since it is larger than the sum of its proper divisors (51491).

5497981 is a wasteful number, since it uses less digits than its factorization.

5497981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51490.

The product of its digits is 90720, while the sum is 43.

The square root of 5497981 is about 2344.7773881544. Note that the first 3 decimals coincide. The cubic root of 5497981 is about 176.4958148098.

The spelling of 5497981 in words is "five million, four hundred ninety-seven thousand, nine hundred eighty-one".