9421452749 has 4 divisors (see below), whose sum is σ = 9746330460. Its totient is φ = 9096575040.

The previous prime is 9421452713. The next prime is 9421452769. The reversal of 9421452749 is 9472541249.

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: 9472541249 = 83 ⋅114127003.

It can be written as a sum of positive squares in 2 ways, for example, as 6472202500 + 2949250249 = 80450^2 + 54307^2 .

It is a cyclic number.

It is not a de Polignac number, because 9421452749 - 2⁸ = 9421452493 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 (9421452769) 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, 162438812 + ... + 162438869.

It is an arithmetic number, because the mean of its divisors is an integer number (2436582615).

Almost surely, 2^9421452749 is an apocalyptic number.

It is an amenable number.

9421452749 is a deficient number, since it is larger than the sum of its proper divisors (324877711).

9421452749 is a wasteful number, since it uses less digits than its factorization.

9421452749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324877710.

The product of its digits is 725760, while the sum is 47.

The square root of 9421452749 is about 97064.1682033077. The cubic root of 9421452749 is about 2112.0585727707.

The spelling of 9421452749 in words is "nine billion, four hundred twenty-one million, four hundred fifty-two thousand, seven hundred forty-nine".