75540987 has 6 divisors (see below), whose sum is σ = 109114772. Its totient is φ = 50360652.

The previous prime is 75540977. The next prime is 75540989. The reversal of 75540987 is 78904557.

75540987 is a `hidden beast` number, since 7 + 554 + 0 + 98 + 7 = 666.

It is not a de Polignac number, because 75540987 - 2⁶ = 75540923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75540989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4196713 + ... + 4196730.

Almost surely, 2^75540987 is an apocalyptic number.

75540987 is a deficient number, since it is larger than the sum of its proper divisors (33573785).

75540987 is a wasteful number, since it uses less digits than its factorization.

75540987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8393449 (or 8393446 counting only the distinct ones).

The product of its (nonzero) digits is 352800, while the sum is 45.

The square root of 75540987 is about 8691.4318152995. The cubic root of 75540987 is about 422.7278735274.

The spelling of 75540987 in words is "seventy-five million, five hundred forty thousand, nine hundred eighty-seven".