87790313 has 16 divisors (see below), whose sum is σ = 98413056. Its totient is φ = 77787840.

The previous prime is 87790303. The next prime is 87790319. The reversal of 87790313 is 31309778.

It is a happy number.

It is not a de Polignac number, because 87790313 - 2¹² = 87786217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87790319) 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, 31028 + ... + 33738.

It is an arithmetic number, because the mean of its divisors is an integer number (6150816).

Almost surely, 2^87790313 is an apocalyptic number.

It is an amenable number.

87790313 is a deficient number, since it is larger than the sum of its proper divisors (10622743).

87790313 is a wasteful number, since it uses less digits than its factorization.

87790313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2824.

The product of its (nonzero) digits is 31752, while the sum is 38.

The square root of 87790313 is about 9369.6484992768. The cubic root of 87790313 is about 444.4424494748.

The spelling of 87790313 in words is "eighty-seven million, seven hundred ninety thousand, three hundred thirteen".