87471401 has 4 divisors (see below), whose sum is σ = 87492804. Its totient is φ = 87450000.

The previous prime is 87471389. The next prime is 87471403. The reversal of 87471401 is 10417478.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10417478 = 2 ⋅5208739.

It can be written as a sum of positive squares in 2 ways, for example, as 86471401 + 1000000 = 9299^2 + 1000^2 .

It is a cyclic number.

It is not a de Polignac number, because 87471401 - 2¹⁰ = 87470377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87471403) 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, 2450 + ... + 13451.

It is an arithmetic number, because the mean of its divisors is an integer number (21873201).

Almost surely, 2^87471401 is an apocalyptic number.

It is an amenable number.

87471401 is a deficient number, since it is larger than the sum of its proper divisors (21403).

87471401 is a wasteful number, since it uses less digits than its factorization.

87471401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21402.

The product of its (nonzero) digits is 6272, while the sum is 32.

The square root of 87471401 is about 9352.6146611522. The cubic root of 87471401 is about 443.9036276644.

Adding to 87471401 its reverse (10417478), we get a palindrome (97888879).

The spelling of 87471401 in words is "eighty-seven million, four hundred seventy-one thousand, four hundred one".