87500001 has 4 divisors (see below), whose sum is σ = 116666672. Its totient is φ = 58333332.

The previous prime is 87499967. The next prime is 87500029. The reversal of 87500001 is 10000578.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 87500001 - 2¹⁰ = 87498977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87500201) 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 3 ways as a sum of consecutive naturals, for example, 14583331 + ... + 14583336.

It is an arithmetic number, because the mean of its divisors is an integer number (29166668).

Almost surely, 2^87500001 is an apocalyptic number.

It is an amenable number.

87500001 is a deficient number, since it is larger than the sum of its proper divisors (29166671).

87500001 is a wasteful number, since it uses less digits than its factorization.

87500001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29166670.

The product of its (nonzero) digits is 280, while the sum is 21.

The square root of 87500001 is about 9354.1435203871. The cubic root of 87500001 is about 443.9520025625.

Adding to 87500001 its reverse (10000578), we get a palindrome (97500579).

The spelling of 87500001 in words is "eighty-seven million, five hundred thousand, one".