706090991 has 8 divisors (see below), whose sum is σ = 715733040. Its totient is φ = 696506688.

The previous prime is 706090969. The next prime is 706090997. The reversal of 706090991 is 199090607.

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 a de Polignac number, because none of the positive numbers 2^k-706090991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (706090997) 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, 10475 + ... + 39011.

It is an arithmetic number, because the mean of its divisors is an integer number (89466630).

Almost surely, 2^706090991 is an apocalyptic number.

706090991 is a deficient number, since it is larger than the sum of its proper divisors (9642049).

706090991 is a wasteful number, since it uses less digits than its factorization.

706090991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28873.

The product of its (nonzero) digits is 30618, while the sum is 41.

The square root of 706090991 is about 26572.3727017367. The cubic root of 706090991 is about 890.4719085520.

The spelling of 706090991 in words is "seven hundred six million, ninety thousand, nine hundred ninety-one".