75887261 has 2 divisors, whose sum is σ = 75887262. Its totient is φ = 75887260.

The previous prime is 75887249. The next prime is 75887263. The reversal of 75887261 is 16278857.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45306361 + 30580900 = 6731^2 + 5530^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75887261 is a prime.

It is a Sophie Germain prime.

Together with 75887263, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75887263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37943630 + 37943631.

It is an arithmetic number, because the mean of its divisors is an integer number (37943631).

Almost surely, 2^75887261 is an apocalyptic number.

It is an amenable number.

75887261 is a deficient number, since it is larger than the sum of its proper divisors (1).

75887261 is an equidigital number, since it uses as much as digits as its factorization.

75887261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 188160, while the sum is 44.

The square root of 75887261 is about 8711.3294622578. The cubic root of 75887261 is about 423.3728063027.

The spelling of 75887261 in words is "seventy-five million, eight hundred eighty-seven thousand, two hundred sixty-one".