740509213 has 2 divisors, whose sum is σ = 740509214. Its totient is φ = 740509212.

The previous prime is 740509201. The next prime is 740509223. The reversal of 740509213 is 312905047.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 539493529 + 201015684 = 23227^2 + 14178^2 .

It is a cyclic number.

It is not a de Polignac number, because 740509213 - 2¹⁷ = 740378141 is a prime.

It is a super-3 number, since 3×740509213³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (740509223) 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 as a sum of consecutive naturals, namely, 370254606 + 370254607.

It is an arithmetic number, because the mean of its divisors is an integer number (370254607).

Almost surely, 2^740509213 is an apocalyptic number.

It is an amenable number.

740509213 is a deficient number, since it is larger than the sum of its proper divisors (1).

740509213 is an equidigital number, since it uses as much as digits as its factorization.

740509213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 740509213 is about 27212.2989289769. The cubic root of 740509213 is about 904.7115929282.

The spelling of 740509213 in words is "seven hundred forty million, five hundred nine thousand, two hundred thirteen".