745161727 has 4 divisors (see below), whose sum is σ = 748360080. Its totient is φ = 741963376.

The previous prime is 745161713. The next prime is 745161737. The reversal of 745161727 is 727161547.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 727161547 = 7 ⋅103880221.

It is a cyclic number.

It is not a de Polignac number, because 745161727 - 2¹⁵ = 745128959 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 745161727.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (745161737) 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, 1598827 + ... + 1599292.

It is an arithmetic number, because the mean of its divisors is an integer number (187090020).

Almost surely, 2^745161727 is an apocalyptic number.

745161727 is a deficient number, since it is larger than the sum of its proper divisors (3198353).

745161727 is a wasteful number, since it uses less digits than its factorization.

745161727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3198352.

The product of its digits is 82320, while the sum is 40.

The square root of 745161727 is about 27297.6505765606. The cubic root of 745161727 is about 906.6023633539.

The spelling of 745161727 in words is "seven hundred forty-five million, one hundred sixty-one thousand, seven hundred twenty-seven".