921976543 has 4 divisors (see below), whose sum is σ = 932335920. Its totient is φ = 911617168.

The previous prime is 921976541. The next prime is 921976547. The reversal of 921976543 is 345679129.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 921976543 - 2¹ = 921976541 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 921976493 and 921976502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (921976541) 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, 5179555 + ... + 5179732.

It is an arithmetic number, because the mean of its divisors is an integer number (233083980).

Almost surely, 2^921976543 is an apocalyptic number.

921976543 is a deficient number, since it is larger than the sum of its proper divisors (10359377).

921976543 is a wasteful number, since it uses less digits than its factorization.

921976543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10359376.

The product of its digits is 408240, while the sum is 46.

The square root of 921976543 is about 30364.0666413443. The cubic root of 921976543 is about 973.2848365805.

The spelling of 921976543 in words is "nine hundred twenty-one million, nine hundred seventy-six thousand, five hundred forty-three".