745234861 has 4 divisors (see below), whose sum is σ = 851696992. Its totient is φ = 638772732.

The previous prime is 745234829. The next prime is 745234873. The reversal of 745234861 is 168432547.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 168432547 = 37 ⋅4552231.

It is a cyclic number.

It is not a de Polignac number, because 745234861 - 2⁵ = 745234829 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 (745234811) 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, 53231055 + ... + 53231068.

It is an arithmetic number, because the mean of its divisors is an integer number (212924248).

Almost surely, 2^745234861 is an apocalyptic number.

It is an amenable number.

745234861 is a deficient number, since it is larger than the sum of its proper divisors (106462131).

745234861 is a wasteful number, since it uses less digits than its factorization.

745234861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106462130.

The product of its digits is 161280, while the sum is 40.

The square root of 745234861 is about 27298.9901095260. The cubic root of 745234861 is about 906.6320219215.

The spelling of 745234861 in words is "seven hundred forty-five million, two hundred thirty-four thousand, eight hundred sixty-one".