87781153 has 2 divisors, whose sum is σ = 87781154. Its totient is φ = 87781152.

The previous prime is 87781139. The next prime is 87781157. The reversal of 87781153 is 35118778.

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., 51093904 + 36687249 = 7148^2 + 6057^2 .

It is a cyclic number.

It is not a de Polignac number, because 87781153 - 2¹⁷ = 87650081 is a prime.

It is not a weakly prime, because it can be changed into another prime (87781157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43890576 + 43890577.

It is an arithmetic number, because the mean of its divisors is an integer number (43890577).

Almost surely, 2^87781153 is an apocalyptic number.

It is an amenable number.

87781153 is a deficient number, since it is larger than the sum of its proper divisors (1).

87781153 is an equidigital number, since it uses as much as digits as its factorization.

87781153 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47040, while the sum is 40.

The square root of 87781153 is about 9369.1596741650. The cubic root of 87781153 is about 444.4269912984.

It can be divided in two parts, 87 and 781153, that multiplied together give a triangular number (67960311 = T₁₁₆₅₈).

The spelling of 87781153 in words is "eighty-seven million, seven hundred eighty-one thousand, one hundred fifty-three".