742817813 has 4 divisors (see below), whose sum is σ = 743117088. Its totient is φ = 742518540.

The previous prime is 742817791. The next prime is 742817849. The reversal of 742817813 is 318718247.

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.

It is a cyclic number.

It is not a de Polignac number, because 742817813 - 2¹⁸ = 742555669 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 (742817893) 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, 145883 + ... + 150888.

It is an arithmetic number, because the mean of its divisors is an integer number (185779272).

Almost surely, 2^742817813 is an apocalyptic number.

It is an amenable number.

742817813 is a deficient number, since it is larger than the sum of its proper divisors (299275).

742817813 is a wasteful number, since it uses less digits than its factorization.

742817813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299274.

The product of its digits is 75264, while the sum is 41.

The square root of 742817813 is about 27254.6842395945. The cubic root of 742817813 is about 905.6507891903.

The spelling of 742817813 in words is "seven hundred forty-two million, eight hundred seventeen thousand, eight hundred thirteen".