7490309 has 2 divisors, whose sum is σ = 7490310. Its totient is φ = 7490308.

The previous prime is 7490303. The next prime is 7490363. The reversal of 7490309 is 9030947.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5808100 + 1682209 = 2410^2 + 1297^2 .

It is a cyclic number.

It is not a de Polignac number, because 7490309 - 2²⁰ = 6441733 is a prime.

It is a super-2 number, since 2×7490309² = 112209457830962, which contains 22 as substring.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7490303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3745154 + 3745155.

It is an arithmetic number, because the mean of its divisors is an integer number (3745155).

Almost surely, 2^7490309 is an apocalyptic number.

It is an amenable number.

7490309 is a deficient number, since it is larger than the sum of its proper divisors (1).

7490309 is an equidigital number, since it uses as much as digits as its factorization.

7490309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6804, while the sum is 32.

The square root of 7490309 is about 2736.8428891699. The cubic root of 7490309 is about 195.6590368700.

It can be divided in two parts, 74 and 90309, that multiplied together give a palindrome (6682866).

The spelling of 7490309 in words is "seven million, four hundred ninety thousand, three hundred nine".