326987921 has 8 divisors (see below), whose sum is σ = 354830784. Its totient is φ = 299529360.

The previous prime is 326987893. The next prime is 326987957. The reversal of 326987921 is 129789623.

It is a happy number.

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

It is not a de Polignac number, because 326987921 - 2¹⁴ = 326971537 is a prime.

It is a super-2 number, since 2×326987921² = 213842200959804482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (326987621) 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, 94301 + ... + 97706.

It is an arithmetic number, because the mean of its divisors is an integer number (44353848).

Almost surely, 2^326987921 is an apocalyptic number.

It is an amenable number.

326987921 is a deficient number, since it is larger than the sum of its proper divisors (27842863).

326987921 is a wasteful number, since it uses less digits than its factorization.

326987921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192151.

The product of its digits is 326592, while the sum is 47.

The square root of 326987921 is about 18082.8073318277. The cubic root of 326987921 is about 688.9333944432.

The spelling of 326987921 in words is "three hundred twenty-six million, nine hundred eighty-seven thousand, nine hundred twenty-one".