87881377 has 2 divisors, whose sum is σ = 87881378. Its totient is φ = 87881376.

The previous prime is 87881371. The next prime is 87881389. The reversal of 87881377 is 77318878.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49056016 + 38825361 = 7004^2 + 6231^2 .

It is a cyclic number.

It is not a de Polignac number, because 87881377 - 2²³ = 79492769 is a prime.

It is a super-2 number, since 2×87881377² = 15446272846832258, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 87881377.

It is not a weakly prime, because it can be changed into another prime (87881371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43940688 + 43940689.

It is an arithmetic number, because the mean of its divisors is an integer number (43940689).

Almost surely, 2^87881377 is an apocalyptic number.

It is an amenable number.

87881377 is a deficient number, since it is larger than the sum of its proper divisors (1).

87881377 is an equidigital number, since it uses as much as digits as its factorization.

87881377 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 526848, while the sum is 49.

The square root of 87881377 is about 9374.5067603581. The cubic root of 87881377 is about 444.5960682509.

The spelling of 87881377 in words is "eighty-seven million, eight hundred eighty-one thousand, three hundred seventy-seven".