87672001 has 4 divisors (see below), whose sum is σ = 87745492. Its totient is φ = 87598512.

The previous prime is 87671993. The next prime is 87672019. The reversal of 87672001 is 10027678.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 39992976 + 47679025 = 6324^2 + 6905^2 .

It is a cyclic number.

It is not a de Polignac number, because 87672001 - 2³ = 87671993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87672071) 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, 34926 + ... + 37351.

It is an arithmetic number, because the mean of its divisors is an integer number (21936373).

Almost surely, 2^87672001 is an apocalyptic number.

It is an amenable number.

87672001 is a deficient number, since it is larger than the sum of its proper divisors (73491).

87672001 is a wasteful number, since it uses less digits than its factorization.

87672001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73490.

The product of its (nonzero) digits is 4704, while the sum is 31.

The square root of 87672001 is about 9363.3327934021. The cubic root of 87672001 is about 444.2427064266.

Adding to 87672001 its reverse (10027678), we get a palindrome (97699679).

The spelling of 87672001 in words is "eighty-seven million, six hundred seventy-two thousand, one".