87575951 has 2 divisors, whose sum is σ = 87575952. Its totient is φ = 87575950.

The previous prime is 87575947. The next prime is 87575953. The reversal of 87575951 is 15957578.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87575951 - 2² = 87575947 is a prime.

It is a Sophie Germain prime.

Together with 87575953, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 87575896 and 87575905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87575953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43787975 + 43787976.

It is an arithmetic number, because the mean of its divisors is an integer number (43787976).

Almost surely, 2^87575951 is an apocalyptic number.

87575951 is a deficient number, since it is larger than the sum of its proper divisors (1).

87575951 is an equidigital number, since it uses as much as digits as its factorization.

87575951 is an evil number, because the sum of its binary digits is even.

The product of its digits is 441000, while the sum is 47.

The square root of 87575951 is about 9358.2023380562. The cubic root of 87575951 is about 444.0804155268.

The spelling of 87575951 in words is "eighty-seven million, five hundred seventy-five thousand, nine hundred fifty-one".