87009401 has 4 divisors (see below), whose sum is σ = 87356304. Its totient is φ = 86662500.

The previous prime is 87009397. The next prime is 87009407. The reversal of 87009401 is 10490078.

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 87009401 - 2² = 87009397 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87009407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 173075 + ... + 173576.

It is an arithmetic number, because the mean of its divisors is an integer number (21839076).

Almost surely, 2^87009401 is an apocalyptic number.

It is an amenable number.

87009401 is a deficient number, since it is larger than the sum of its proper divisors (346903).

87009401 is a wasteful number, since it uses less digits than its factorization.

87009401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346902.

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

The square root of 87009401 is about 9327.8829859728. The cubic root of 87009401 is about 443.1207218546.

Adding to 87009401 its reverse (10490078), we get a palindrome (97499479).

The spelling of 87009401 in words is "eighty-seven million, nine thousand, four hundred one".