75379999 has 2 divisors, whose sum is σ = 75380000.
Its totient is φ = 75379998.
The previous prime is 75379981. The next prime is 75380009. The reversal of 75379999 is 99997357.
It is a strong prime.
It is an emirp because it is prime and its reverse (99997357) is a distict prime.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-75379999 is a prime.
75379999 is a modest number, since divided by 9999 gives 7537 as remainder.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (75379949) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37689999 + 37690000.
It is an arithmetic number, because the mean of its divisors is an integer number (37690000).
Almost surely, 275379999 is an apocalyptic number.
75379999 is a deficient number, since it is larger than the sum of its proper divisors (1).
75379999 is an equidigital number, since it uses as much as digits as its factorization.
75379999 is an evil number, because the sum of its binary digits is even.
The product of its digits is 4822335, while the sum is 58.
The square root of 75379999 is about 8682.1655708700.
The cubic root of 75379999 is about 422.4273633051.
The spelling of 75379999 in words is "seventy-five million, three hundred seventy-nine thousand, nine hundred ninety-nine".