705400657 has 4 divisors (see below), whose sum is σ = 759662260. Its totient is φ = 651139056.

The previous prime is 705400651. The next prime is 705400667. The reversal of 705400657 is 756004507.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 133425601 + 571975056 = 11551^2 + 23916^2 .

It is a cyclic number.

It is not a de Polignac number, because 705400657 - 2¹¹ = 705398609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (705400651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27130782 + ... + 27130807.

It is an arithmetic number, because the mean of its divisors is an integer number (189915565).

Almost surely, 2^705400657 is an apocalyptic number.

It is an amenable number.

705400657 is a deficient number, since it is larger than the sum of its proper divisors (54261603).

705400657 is a wasteful number, since it uses less digits than its factorization.

705400657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54261602.

The product of its (nonzero) digits is 29400, while the sum is 34.

The square root of 705400657 is about 26559.3798308620. The cubic root of 705400657 is about 890.1816138231.

The spelling of 705400657 in words is "seven hundred five million, four hundred thousand, six hundred fifty-seven".