75379949 has 2 divisors, whose sum is σ = 75379950. Its totient is φ = 75379948.

The previous prime is 75379937. The next prime is 75379979. The reversal of 75379949 is 94997357.

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., 73650724 + 1729225 = 8582^2 + 1315^2 .

It is a cyclic number.

It is not a de Polignac number, because 75379949 - 2⁴ = 75379933 is a prime.

It is a super-2 number, since 2×75379949² = 11364273422485202, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 75379949.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75379979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37689974 + 37689975.

It is an arithmetic number, because the mean of its divisors is an integer number (37689975).

Almost surely, 2^75379949 is an apocalyptic number.

It is an amenable number.

75379949 is a deficient number, since it is larger than the sum of its proper divisors (1).

75379949 is an equidigital number, since it uses as much as digits as its factorization.

75379949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2143260, while the sum is 53.

The square root of 75379949 is about 8682.1626914036. The cubic root of 75379949 is about 422.4272699055.

The spelling of 75379949 in words is "seventy-five million, three hundred seventy-nine thousand, nine hundred forty-nine".