742806491 has 4 divisors (see below), whose sum is σ = 848921712. Its totient is φ = 636691272.

The previous prime is 742806451. The next prime is 742806497. The reversal of 742806491 is 194608247.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 742806491 - 2¹⁰ = 742805467 is a prime.

It is a super-3 number, since 3×742806491³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (742806497) 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, 53057600 + ... + 53057613.

It is an arithmetic number, because the mean of its divisors is an integer number (212230428).

Almost surely, 2^742806491 is an apocalyptic number.

742806491 is a deficient number, since it is larger than the sum of its proper divisors (106115221).

742806491 is a wasteful number, since it uses less digits than its factorization.

742806491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106115220.

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 742806491 is about 27254.4765313884. The cubic root of 742806491 is about 905.6461878690.

The spelling of 742806491 in words is "seven hundred forty-two million, eight hundred six thousand, four hundred ninety-one".