74906213 has 4 divisors (see below), whose sum is σ = 75678540. Its totient is φ = 74133888.

The previous prime is 74906197. The next prime is 74906243. The reversal of 74906213 is 31260947.

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

It can be written as a sum of positive squares in 2 ways, for example, as 45670564 + 29235649 = 6758^2 + 5407^2 .

It is a cyclic number.

It is not a de Polignac number, because 74906213 - 2⁴ = 74906197 is a prime.

It is a super-3 number, since 3×74906213³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 74906213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74906243) 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, 386018 + ... + 386211.

It is an arithmetic number, because the mean of its divisors is an integer number (18919635).

Almost surely, 2^74906213 is an apocalyptic number.

It is an amenable number.

74906213 is a deficient number, since it is larger than the sum of its proper divisors (772327).

74906213 is an equidigital number, since it uses as much as digits as its factorization.

74906213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 772326.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 74906213 is about 8654.8375490242. The cubic root of 74906213 is about 421.5404748400.

The spelling of 74906213 in words is "seventy-four million, nine hundred six thousand, two hundred thirteen".