75072799 has 4 divisors (see below), whose sum is σ = 79488864. Its totient is φ = 70656736.

The previous prime is 75072757. The next prime is 75072853. The reversal of 75072799 is 99727057.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99727057 = 23 ⋅4335959.

It is a cyclic number.

It is not a de Polignac number, because 75072799 - 2⁷ = 75072671 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 (75072709) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2208007 + ... + 2208040.

It is an arithmetic number, because the mean of its divisors is an integer number (19872216).

Almost surely, 2^75072799 is an apocalyptic number.

75072799 is a deficient number, since it is larger than the sum of its proper divisors (4416065).

75072799 is a wasteful number, since it uses less digits than its factorization.

75072799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4416064.

The product of its (nonzero) digits is 277830, while the sum is 46.

The square root of 75072799 is about 8664.4560706371. The cubic root of 75072799 is about 421.8527353152.

The spelling of 75072799 in words is "seventy-five million, seventy-two thousand, seven hundred ninety-nine".