859974749 has 2 divisors, whose sum is σ = 859974750. Its totient is φ = 859974748.

The previous prime is 859974697. The next prime is 859974779. The reversal of 859974749 is 947479958.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 448168900 + 411805849 = 21170^2 + 20293^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-859974749 is a prime.

It is a super-2 number, since 2×859974749² = 1479113137835226002, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 859974691 and 859974700.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (859974779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 429987374 + 429987375.

It is an arithmetic number, because the mean of its divisors is an integer number (429987375).

Almost surely, 2^859974749 is an apocalyptic number.

It is an amenable number.

859974749 is a deficient number, since it is larger than the sum of its proper divisors (1).

859974749 is an equidigital number, since it uses as much as digits as its factorization.

859974749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22861440, while the sum is 62.

The square root of 859974749 is about 29325.3260680934. The cubic root of 859974749 is about 950.9592338866.

The spelling of 859974749 in words is "eight hundred fifty-nine million, nine hundred seventy-four thousand, seven hundred forty-nine".