75387881 has 2 divisors, whose sum is σ = 75387882. Its totient is φ = 75387880.

The previous prime is 75387853. The next prime is 75387929. The reversal of 75387881 is 18878357.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74978281 + 409600 = 8659^2 + 640^2 .

It is an emirp because it is prime and its reverse (18878357) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 75387881 - 2⁶ = 75387817 is a prime.

It is a super-2 number, since 2×75387881² = 11366665203340322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (75387181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37693940 + 37693941.

It is an arithmetic number, because the mean of its divisors is an integer number (37693941).

Almost surely, 2^75387881 is an apocalyptic number.

It is an amenable number.

75387881 is a deficient number, since it is larger than the sum of its proper divisors (1).

75387881 is an equidigital number, since it uses as much as digits as its factorization.

75387881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 376320, while the sum is 47.

The square root of 75387881 is about 8682.6194780147. The cubic root of 75387881 is about 422.4420862930.

The spelling of 75387881 in words is "seventy-five million, three hundred eighty-seven thousand, eight hundred eighty-one".