701991551 has 8 divisors (see below), whose sum is σ = 711508800. Its totient is φ = 692490240.

The previous prime is 701991547. The next prime is 701991569. The reversal of 701991551 is 155199107.

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 701991551 - 2² = 701991547 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 (701991571) 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, 104255 + ... + 110783.

It is an arithmetic number, because the mean of its divisors is an integer number (88938600).

Almost surely, 2^701991551 is an apocalyptic number.

701991551 is a deficient number, since it is larger than the sum of its proper divisors (9517249).

701991551 is a wasteful number, since it uses less digits than its factorization.

701991551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7969.

The product of its (nonzero) digits is 14175, while the sum is 38.

The square root of 701991551 is about 26495.1231550261. The cubic root of 701991551 is about 888.7452549624.

The spelling of 701991551 in words is "seven hundred one million, nine hundred ninety-one thousand, five hundred fifty-one".