17972949 has 8 divisors (see below), whose sum is σ = 24040800. Its totient is φ = 11943536.

The previous prime is 17972947. The next prime is 17972971. The reversal of 17972949 is 94927971.

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 17972949 - 2¹ = 17972947 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 17972898 and 17972907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17972947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8499 + ... + 10400.

It is an arithmetic number, because the mean of its divisors is an integer number (3005100).

Almost surely, 2^17972949 is an apocalyptic number.

It is an amenable number.

17972949 is a deficient number, since it is larger than the sum of its proper divisors (6067851).

17972949 is a wasteful number, since it uses less digits than its factorization.

17972949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19219.

The product of its digits is 285768, while the sum is 48.

The square root of 17972949 is about 4239.4514975407. The cubic root of 17972949 is about 261.9427890155.

The spelling of 17972949 in words is "seventeen million, nine hundred seventy-two thousand, nine hundred forty-nine".