87206973 has 16 divisors (see below), whose sum is σ = 137470080. Its totient is φ = 48113856.

The previous prime is 87206953. The next prime is 87206983. The reversal of 87206973 is 37960278.

It is not a de Polignac number, because 87206973 - 2¹³ = 87198781 is a prime.

It is a super-2 number, since 2×87206973² = 15210112279645458, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87206953) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70990 + ... + 72207.

It is an arithmetic number, because the mean of its divisors is an integer number (8591880).

Almost surely, 2^87206973 is an apocalyptic number.

It is an amenable number.

87206973 is a deficient number, since it is larger than the sum of its proper divisors (50263107).

87206973 is a wasteful number, since it uses less digits than its factorization.

87206973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143236.

The product of its (nonzero) digits is 127008, while the sum is 42.

The square root of 87206973 is about 9338.4673796079. The cubic root of 87206973 is about 443.4558659675.

The spelling of 87206973 in words is "eighty-seven million, two hundred six thousand, nine hundred seventy-three".