745469861 has 4 divisors (see below), whose sum is σ = 746218572. Its totient is φ = 744721152.

The previous prime is 745469849. The next prime is 745469863. The reversal of 745469861 is 168964547.

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 596873761 + 148596100 = 24431^2 + 12190^2 .

It is a cyclic number.

It is not a de Polignac number, because 745469861 - 2¹⁴ = 745453477 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 (745469863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 372860 + ... + 374853.

It is an arithmetic number, because the mean of its divisors is an integer number (186554643).

Almost surely, 2^745469861 is an apocalyptic number.

It is an amenable number.

745469861 is a deficient number, since it is larger than the sum of its proper divisors (748711).

745469861 is an equidigital number, since it uses as much as digits as its factorization.

745469861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 748710.

The product of its digits is 1451520, while the sum is 50.

The square root of 745469861 is about 27303.2939587882. The cubic root of 745469861 is about 906.7273100627.

The spelling of 745469861 in words is "seven hundred forty-five million, four hundred sixty-nine thousand, eight hundred sixty-one".