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75499469 is a prime number

75499469 has 2 divisors, whose sum is σ = 75499470. Its totient is φ = 75499468.

The previous prime is 75499433. The next prime is 75499471. The reversal of 75499469 is 96499457.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75030244 + 469225 = 8662^2 + 685^2 .

It is an emirp because it is prime and its reverse (96499457) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 75499469 - 28 = 75499213 is a prime.

It is a super-2 number, since 2×754994692 = 11400339638563922, which contains 22 as substring.

Together with 75499471, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 75499469.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75499429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37749734 + 37749735.

It is an arithmetic number, because the mean of its divisors is an integer number (37749735).

Almost surely, 275499469 is an apocalyptic number.

It is an amenable number.

75499469 is a deficient number, since it is larger than the sum of its proper divisors (1).

75499469 is an equidigital number, since it uses as much as digits as its factorization.

75499469 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2449440, while the sum is 53.

The square root of 75499469 is about 8689.0430428212. The cubic root of 75499469 is about 422.6504143320.

The spelling of 75499469 in words is "seventy-five million, four hundred ninety-nine thousand, four hundred sixty-nine".