87291650 has 24 divisors (see below), whose sum is σ = 163466100. Its totient is φ = 34679360.

The previous prime is 87291641. The next prime is 87291661. The reversal of 87291650 is 5619278.

It is a Cunningham number, because it is equal to 9343²+1.

It can be written as a sum of positive squares in 6 ways, for example, as 373321 + 86918329 = 611^2 + 9323^2 .

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1592 + ... + 13308.

Almost surely, 2^87291650 is an apocalyptic number.

87291650 is a deficient number, since it is larger than the sum of its proper divisors (76174450).

87291650 is a wasteful number, since it uses less digits than its factorization.

87291650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11878 (or 11873 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 87291650 is about 9343.0000535160. Note that the first 4 decimals coincide. The cubic root of 87291650 is about 443.5993497735.

The spelling of 87291650 in words is "eighty-seven million, two hundred ninety-one thousand, six hundred fifty".