5197981 has 8 divisors (see below), whose sum is σ = 5313600. Its totient is φ = 5083680.

The previous prime is 5197967. The next prime is 5198003. The reversal of 5197981 is 1897915.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 5197981 - 2⁷ = 5197853 is a prime.

It is a super-2 number, since 2×5197981² = 54038012952722, 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 (5197081) 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, 12505 + ... + 12913.

It is an arithmetic number, because the mean of its divisors is an integer number (664200).

Almost surely, 2^5197981 is an apocalyptic number.

It is an amenable number.

5197981 is a deficient number, since it is larger than the sum of its proper divisors (115619).

5197981 is a wasteful number, since it uses less digits than its factorization.

5197981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 659.

The product of its digits is 22680, while the sum is 40.

The square root of 5197981 is about 2279.9081121835. The cubic root of 5197981 is about 173.2253958995.

The spelling of 5197981 in words is "five million, one hundred ninety-seven thousand, nine hundred eighty-one".