87208061 has 4 divisors (see below), whose sum is σ = 87793500. Its totient is φ = 86622624.

The previous prime is 87208057. The next prime is 87208091. The reversal of 87208061 is 16080278.

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 57668836 + 29539225 = 7594^2 + 5435^2 .

It is a cyclic number.

It is not a de Polignac number, because 87208061 - 2² = 87208057 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87208031) 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, 292496 + ... + 292793.

It is an arithmetic number, because the mean of its divisors is an integer number (21948375).

Almost surely, 2^87208061 is an apocalyptic number.

It is an amenable number.

87208061 is a deficient number, since it is larger than the sum of its proper divisors (585439).

87208061 is a wasteful number, since it uses less digits than its factorization.

87208061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 585438.

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 87208061 is about 9338.5256330965. The cubic root of 87208061 is about 443.4577101548.

The spelling of 87208061 in words is "eighty-seven million, two hundred eight thousand, sixty-one".