747949 has 4 divisors (see below), whose sum is σ = 791964. Its totient is φ = 703936.

The previous prime is 747941. The next prime is 747953. The reversal of 747949 is 949747.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 949747 = 31 ⋅30637.

It can be written as a sum of positive squares in 2 ways, for example, as 381924 + 366025 = 618^2 + 605^2 .

It is not a de Polignac number, because 747949 - 2³ = 747941 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.

747949 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (747941) 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, 21982 + ... + 22015.

It is an arithmetic number, because the mean of its divisors is an integer number (197991).

2⁷⁴⁷⁹⁴⁹ is an apocalyptic number.

It is an amenable number.

747949 is a deficient number, since it is larger than the sum of its proper divisors (44015).

747949 is a wasteful number, since it uses less digits than its factorization.

747949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44014.

The product of its digits is 63504, while the sum is 40.

The square root of 747949 is about 864.8404477128. The cubic root of 747949 is about 90.7731337128.

The spelling of 747949 in words is "seven hundred forty-seven thousand, nine hundred forty-nine".