921965997 has 8 divisors (see below), whose sum is σ = 1229461344. Its totient is φ = 614557328.

The previous prime is 921965951. The next prime is 921966007. The reversal of 921965997 is 799569129.

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 921965997 - 2¹⁶ = 921900461 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (921965917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9598 + ... + 44000.

It is an arithmetic number, because the mean of its divisors is an integer number (153682668).

Almost surely, 2^921965997 is an apocalyptic number.

It is an amenable number.

921965997 is a deficient number, since it is larger than the sum of its proper divisors (307495347).

921965997 is a wasteful number, since it uses less digits than its factorization.

921965997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43339.

The product of its digits is 2755620, while the sum is 57.

The square root of 921965997 is about 30363.8929816320. The cubic root of 921965997 is about 973.2811256035.

The spelling of 921965997 in words is "nine hundred twenty-one million, nine hundred sixty-five thousand, nine hundred ninety-seven".