87620122 has 4 divisors (see below), whose sum is σ = 131430186. Its totient is φ = 43810060.

The previous prime is 87620119. The next prime is 87620123. The reversal of 87620122 is 22102678.

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

It can be written as a sum of positive squares in only one way, i.e., 87590881 + 29241 = 9359^2 + 171^2 .

It is not an unprimeable number, because it can be changed into a prime (87620123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21905029 + ... + 21905032.

Almost surely, 2^87620122 is an apocalyptic number.

87620122 is a deficient number, since it is larger than the sum of its proper divisors (43810064).

87620122 is a wasteful number, since it uses less digits than its factorization.

87620122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43810063.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 87620122 is about 9360.5620557742. The cubic root of 87620122 is about 444.1550637946.

The spelling of 87620122 in words is "eighty-seven million, six hundred twenty thousand, one hundred twenty-two".