706813921 has 8 divisors (see below), whose sum is σ = 771436800. Its totient is φ = 642252240.

The previous prime is 706813853. The next prime is 706813951. The reversal of 706813921 is 129318607.

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 706813921 - 2¹⁷ = 706682849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (706813951) 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, 10800 + ... + 39118.

It is an arithmetic number, because the mean of its divisors is an integer number (96429600).

Almost surely, 2^706813921 is an apocalyptic number.

It is an amenable number.

706813921 is a deficient number, since it is larger than the sum of its proper divisors (64622879).

706813921 is a wasteful number, since it uses less digits than its factorization.

706813921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30599.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 706813921 is about 26585.9722598215. The cubic root of 706813921 is about 890.7757075852.

The spelling of 706813921 in words is "seven hundred six million, eight hundred thirteen thousand, nine hundred twenty-one".