75117249 has 6 divisors (see below), whose sum is σ = 108502706. Its totient is φ = 50078160.

The previous prime is 75117227. The next prime is 75117257. The reversal of 75117249 is 94271157.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 72335025 + 2782224 = 8505^2 + 1668^2 .

It is not a de Polignac number, because 75117249 - 2⁹ = 75116737 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (75117209) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4173172 + ... + 4173189.

Almost surely, 2^75117249 is an apocalyptic number.

It is an amenable number.

75117249 is a deficient number, since it is larger than the sum of its proper divisors (33385457).

75117249 is a wasteful number, since it uses less digits than its factorization.

75117249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8346367 (or 8346364 counting only the distinct ones).

The product of its digits is 17640, while the sum is 36.

The square root of 75117249 is about 8667.0207684071. The cubic root of 75117249 is about 421.9359774246.

The spelling of 75117249 in words is "seventy-five million, one hundred seventeen thousand, two hundred forty-nine".