747409493 has 4 divisors (see below), whose sum is σ = 747624108. Its totient is φ = 747194880.

The previous prime is 747409483. The next prime is 747409499. The reversal of 747409493 is 394904747.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 394904747 = 17 ⋅23229691.

It can be written as a sum of positive squares in 2 ways, for example, as 358609969 + 388799524 = 18937^2 + 19718^2 .

It is a cyclic number.

It is not a de Polignac number, because 747409493 - 2¹² = 747405397 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 (747409499) 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, 101996 + ... + 109077.

It is an arithmetic number, because the mean of its divisors is an integer number (186906027).

Almost surely, 2^747409493 is an apocalyptic number.

It is an amenable number.

747409493 is a deficient number, since it is larger than the sum of its proper divisors (214615).

747409493 is a wasteful number, since it uses less digits than its factorization.

747409493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214614.

The product of its (nonzero) digits is 762048, while the sum is 47.

The square root of 747409493 is about 27338.7909937510. The cubic root of 747409493 is about 907.5130311531.

The spelling of 747409493 in words is "seven hundred forty-seven million, four hundred nine thousand, four hundred ninety-three".