75517989 has 16 divisors (see below), whose sum is σ = 107448000. Its totient is φ = 47039616.

The previous prime is 75517987. The next prime is 75517991. The reversal of 75517989 is 98971557.

It is an interprime number because it is at equal distance from previous prime (75517987) and next prime (75517991).

It is not a de Polignac number, because 75517989 - 2¹ = 75517987 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75517987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4914 + ... + 13235.

It is an arithmetic number, because the mean of its divisors is an integer number (6715500).

Almost surely, 2^75517989 is an apocalyptic number.

It is an amenable number.

75517989 is a deficient number, since it is larger than the sum of its proper divisors (31930011).

75517989 is a wasteful number, since it uses less digits than its factorization.

75517989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18244.

The product of its digits is 793800, while the sum is 51.

The square root of 75517989 is about 8690.1086874676. The cubic root of 75517989 is about 422.6849701854.

The spelling of 75517989 in words is "seventy-five million, five hundred seventeen thousand, nine hundred eighty-nine".