748387645 has 4 divisors (see below), whose sum is σ = 898065180. Its totient is φ = 598710112.

The previous prime is 748387531. The next prime is 748387669. The reversal of 748387645 is 546783847.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 546783847 = 1979 ⋅276293.

It can be written as a sum of positive squares in 2 ways, for example, as 186650244 + 561737401 = 13662^2 + 23701^2 .

It is a cyclic number.

It is not a de Polignac number, because 748387645 - 2¹³ = 748379453 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 748387592 and 748387601.

It is a congruent number.

It is an unprimeable number.

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, 74838760 + ... + 74838769.

It is an arithmetic number, because the mean of its divisors is an integer number (224516295).

Almost surely, 2^748387645 is an apocalyptic number.

It is an amenable number.

748387645 is a deficient number, since it is larger than the sum of its proper divisors (149677535).

748387645 is a wasteful number, since it uses less digits than its factorization.

748387645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149677534.

The product of its digits is 4515840, while the sum is 52.

The square root of 748387645 is about 27356.6745968877. The cubic root of 748387645 is about 907.9087529679.

The spelling of 748387645 in words is "seven hundred forty-eight million, three hundred eighty-seven thousand, six hundred forty-five".