87620293 has 2 divisors, whose sum is σ = 87620294. Its totient is φ = 87620292.

The previous prime is 87620279. The next prime is 87620303. The reversal of 87620293 is 39202678.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74356129 + 13264164 = 8623^2 + 3642^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87620293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87620893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43810146 + 43810147.

It is an arithmetic number, because the mean of its divisors is an integer number (43810147).

Almost surely, 2^87620293 is an apocalyptic number.

It is an amenable number.

87620293 is a deficient number, since it is larger than the sum of its proper divisors (1).

87620293 is an equidigital number, since it uses as much as digits as its factorization.

87620293 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 87620293 is about 9360.5711898367. The cubic root of 87620293 is about 444.1553527330.

The spelling of 87620293 in words is "eighty-seven million, six hundred twenty thousand, two hundred ninety-three".