87040001 has 2 divisors, whose sum is σ = 87040002. Its totient is φ = 87040000.

The previous prime is 87039973. The next prime is 87040039. The reversal of 87040001 is 10004078.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86583025 + 456976 = 9305^2 + 676^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87040001 is a prime.

It is not a weakly prime, because it can be changed into another prime (87040081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43520000 + 43520001.

It is an arithmetic number, because the mean of its divisors is an integer number (43520001).

Almost surely, 2^87040001 is an apocalyptic number.

It is an amenable number.

87040001 is a deficient number, since it is larger than the sum of its proper divisors (1).

87040001 is an equidigital number, since it uses as much as digits as its factorization.

87040001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 87040001 is about 9329.5230853458. The cubic root of 87040001 is about 443.1726622376.

Adding to 87040001 its reverse (10004078), we get a palindrome (97044079).

The spelling of 87040001 in words is "eighty-seven million, forty thousand, one".