705400091 has 8 divisors (see below), whose sum is σ = 814793904. Its totient is φ = 603550720.

The previous prime is 705400051. The next prime is 705400169. The reversal of 705400091 is 190004507.

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 705400091 - 2²² = 701205787 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 705400091.

It is not an unprimeable number, because it can be changed into a prime (705400001) 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, 1885910 + ... + 1886283.

It is an arithmetic number, because the mean of its divisors is an integer number (101849238).

Almost surely, 2^705400091 is an apocalyptic number.

705400091 is a deficient number, since it is larger than the sum of its proper divisors (109393813).

705400091 is a wasteful number, since it uses less digits than its factorization.

705400091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3772221.

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 705400091 is about 26559.3691754906. The cubic root of 705400091 is about 890.1813757348.

Adding to 705400091 its reverse (190004507), we get a palindrome (895404598).

The spelling of 705400091 in words is "seven hundred five million, four hundred thousand, ninety-one".