75279997 has 8 divisors (see below), whose sum is σ = 83686400. Its totient is φ = 67247280.

The previous prime is 75279991. The next prime is 75280001. The reversal of 75279997 is 79997257.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 75279997 - 2¹⁵ = 75247229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75279991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92997 + ... + 93802.

It is an arithmetic number, because the mean of its divisors is an integer number (10460800).

Almost surely, 2^75279997 is an apocalyptic number.

It is an amenable number.

75279997 is a deficient number, since it is larger than the sum of its proper divisors (8406403).

75279997 is a wasteful number, since it uses less digits than its factorization.

75279997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186843.

The product of its digits is 2500470, while the sum is 55.

The square root of 75279997 is about 8676.4046125109. The cubic root of 75279997 is about 422.2404778528.

The spelling of 75279997 in words is "seventy-five million, two hundred seventy-nine thousand, nine hundred ninety-seven".