748186609 has 9 divisors (see below), whose sum is σ = 795280737. Its totient is φ = 703737984.

The previous prime is 748186603. The next prime is 748186633. The reversal of 748186609 is 906681847.

The square root of 748186609 is 27353.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 481583025 + 266603584 = 21945^2 + 16328^2 .

It is not a de Polignac number, because 748186609 - 2³ = 748186601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (748186601) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 464197 + ... + 465805.

Almost surely, 2^748186609 is an apocalyptic number.

748186609 is the 27353-rd square number.

748186609 is the 13677-th centered octagonal number.

It is an amenable number.

748186609 is a deficient number, since it is larger than the sum of its proper divisors (47094128).

748186609 is an frugal number, since it uses more digits than its factorization.

748186609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3252 (or 1626 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 49.

The cubic root of 748186609 is about 907.8274498753.

Multiplying 748186609 by its sum of digits (49), we get a square (36661143841 = 191471²).

The spelling of 748186609 in words is "seven hundred forty-eight million, one hundred eighty-six thousand, six hundred nine".