748456861 has 4 divisors (see below), whose sum is σ = 748721692. Its totient is φ = 748192032.

The previous prime is 748456859. The next prime is 748456871. The reversal of 748456861 is 168654847.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 168654847 = 47 ⋅3588401.

It can be written as a sum of positive squares in 2 ways, for example, as 460102500 + 288354361 = 21450^2 + 16981^2 .

It is a cyclic number.

It is not a de Polignac number, because 748456861 - 2¹ = 748456859 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 (748456801) 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, 128130 + ... + 133843.

It is an arithmetic number, because the mean of its divisors is an integer number (187180423).

Almost surely, 2^748456861 is an apocalyptic number.

It is an amenable number.

748456861 is a deficient number, since it is larger than the sum of its proper divisors (264831).

748456861 is a wasteful number, since it uses less digits than its factorization.

748456861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264830.

The product of its digits is 1290240, while the sum is 49.

The square root of 748456861 is about 27357.9396336786. The cubic root of 748456861 is about 907.9367419721.

The spelling of 748456861 in words is "seven hundred forty-eight million, four hundred fifty-six thousand, eight hundred sixty-one".