87263381 has 2 divisors, whose sum is σ = 87263382. Its totient is φ = 87263380.

The previous prime is 87263369. The next prime is 87263389. The reversal of 87263381 is 18336278.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84474481 + 2788900 = 9191^2 + 1670^2 .

It is a cyclic number.

It is not a de Polignac number, because 87263381 - 2¹⁴ = 87246997 is a prime.

It is a super-2 number, since 2×87263381² = 15229795327102322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87263389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43631690 + 43631691.

It is an arithmetic number, because the mean of its divisors is an integer number (43631691).

Almost surely, 2^87263381 is an apocalyptic number.

It is an amenable number.

87263381 is a deficient number, since it is larger than the sum of its proper divisors (1).

87263381 is an equidigital number, since it uses as much as digits as its factorization.

87263381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 38.

The square root of 87263381 is about 9341.4870871826. The cubic root of 87263381 is about 443.5514587326.

The spelling of 87263381 in words is "eighty-seven million, two hundred sixty-three thousand, three hundred eighty-one".