87380501 has 4 divisors (see below), whose sum is σ = 94102092. Its totient is φ = 80658912.

The previous prime is 87380497. The next prime is 87380521. The reversal of 87380501 is 10508378.

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 53728900 + 33651601 = 7330^2 + 5801^2 .

It is a cyclic number.

It is not a de Polignac number, because 87380501 - 2² = 87380497 is a prime.

It is a super-2 number, since 2×87380501² = 15270703910022002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87380521) 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, 3360776 + ... + 3360801.

It is an arithmetic number, because the mean of its divisors is an integer number (23525523).

Almost surely, 2^87380501 is an apocalyptic number.

It is an amenable number.

87380501 is a deficient number, since it is larger than the sum of its proper divisors (6721591).

87380501 is a wasteful number, since it uses less digits than its factorization.

87380501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6721590.

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 87380501 is about 9347.7537943615. The cubic root of 87380501 is about 443.7498066256.

Adding to 87380501 its reverse (10508378), we get a palindrome (97888879).

The spelling of 87380501 in words is "eighty-seven million, three hundred eighty thousand, five hundred one".