706738921 has 8 divisors (see below), whose sum is σ = 808364480. Its totient is φ = 605279088.

The previous prime is 706738919. The next prime is 706738931. The reversal of 706738921 is 129837607.

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 706738921 - 2¹ = 706738919 is a prime.

It is a super-3 number, since 3×706738921³ (a number of 28 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (706738931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32151 + ... + 49468.

It is an arithmetic number, because the mean of its divisors is an integer number (101045560).

Almost surely, 2^706738921 is an apocalyptic number.

It is an amenable number.

706738921 is a deficient number, since it is larger than the sum of its proper divisors (101625559).

706738921 is a wasteful number, since it uses less digits than its factorization.

706738921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82863.

The product of its (nonzero) digits is 127008, while the sum is 43.

The square root of 706738921 is about 26584.5617041169. The cubic root of 706738921 is about 890.7441997446.

The spelling of 706738921 in words is "seven hundred six million, seven hundred thirty-eight thousand, nine hundred twenty-one".