87409001 has 4 divisors (see below), whose sum is σ = 87441792. Its totient is φ = 87376212.

The previous prime is 87408991. The next prime is 87409009. The reversal of 87409001 is 10090478.

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 a cyclic number.

It is not a de Polignac number, because 87409001 - 2²² = 83214697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87409009) 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, 12005 + ... + 17858.

It is an arithmetic number, because the mean of its divisors is an integer number (21860448).

Almost surely, 2^87409001 is an apocalyptic number.

It is an amenable number.

87409001 is a deficient number, since it is larger than the sum of its proper divisors (32791).

87409001 is a wasteful number, since it uses less digits than its factorization.

87409001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32790.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 87409001 is about 9349.2781004739. The cubic root of 87409001 is about 443.7980458194.

Adding to 87409001 its reverse (10090478), we get a palindrome (97499479).

The spelling of 87409001 in words is "eighty-seven million, four hundred nine thousand, one".