4293390557 has 4 divisors (see below), whose sum is σ = 4374397980. Its totient is φ = 4212383136.

The previous prime is 4293390487. The next prime is 4293390559. The reversal of 4293390557 is 7550933924.

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 3886400281 + 406990276 = 62341^2 + 20174^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4293390557 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 (4293390559) 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, 40503632 + ... + 40503737.

It is an arithmetic number, because the mean of its divisors is an integer number (1093599495).

Almost surely, 2^4293390557 is an apocalyptic number.

It is an amenable number.

4293390557 is a deficient number, since it is larger than the sum of its proper divisors (81007423).

4293390557 is an equidigital number, since it uses as much as digits as its factorization.

4293390557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81007422.

The product of its (nonzero) digits is 1020600, while the sum is 47.

The square root of 4293390557 is about 65523.9693318407. The cubic root of 4293390557 is about 1625.2997388859.

The spelling of 4293390557 in words is "four billion, two hundred ninety-three million, three hundred ninety thousand, five hundred fifty-seven".