742803213 has 4 divisors (see below), whose sum is σ = 990404288. Its totient is φ = 495202140.

The previous prime is 742803209. The next prime is 742803223. The reversal of 742803213 is 312308247.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 312308247 = 3 ⋅104102749.

It is not a de Polignac number, because 742803213 - 2² = 742803209 is a prime.

It is a super-2 number, since 2×742803213² = 1103513226486246738, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (742803223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123800533 + ... + 123800538.

It is an arithmetic number, because the mean of its divisors is an integer number (247601072).

Almost surely, 2^742803213 is an apocalyptic number.

It is an amenable number.

742803213 is a deficient number, since it is larger than the sum of its proper divisors (247601075).

742803213 is a wasteful number, since it uses less digits than its factorization.

742803213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247601074.

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 742803213 is about 27254.4163944121. The cubic root of 742803213 is about 905.6448556635.

The spelling of 742803213 in words is "seven hundred forty-two million, eight hundred three thousand, two hundred thirteen".