75209213 has 2 divisors, whose sum is σ = 75209214. Its totient is φ = 75209212.

The previous prime is 75209191. The next prime is 75209249. The reversal of 75209213 is 31290257.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44328964 + 30880249 = 6658^2 + 5557^2 .

It is a cyclic number.

It is not a de Polignac number, because 75209213 - 2²⁰ = 74160637 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is equal to p_4405853 and since 75209213 and 4405853 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75209713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37604606 + 37604607.

It is an arithmetic number, because the mean of its divisors is an integer number (37604607).

Almost surely, 2^75209213 is an apocalyptic number.

It is an amenable number.

75209213 is a deficient number, since it is larger than the sum of its proper divisors (1).

75209213 is an equidigital number, since it uses as much as digits as its factorization.

75209213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 75209213 is about 8672.3245442038. The cubic root of 75209213 is about 422.1080954419.

The spelling of 75209213 in words is "seventy-five million, two hundred nine thousand, two hundred thirteen".