87761069 has 4 divisors (see below), whose sum is σ = 95739360. Its totient is φ = 79782780.

The previous prime is 87761029. The next prime is 87761071. The reversal of 87761069 is 96016778.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 87761069 - 2²⁴ = 70983853 is a prime.

It is a super-2 number, since 2×87761069² = 15404010464045522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87761029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3989129 + ... + 3989150.

It is an arithmetic number, because the mean of its divisors is an integer number (23934840).

Almost surely, 2^87761069 is an apocalyptic number.

It is an amenable number.

87761069 is a deficient number, since it is larger than the sum of its proper divisors (7978291).

87761069 is a wasteful number, since it uses less digits than its factorization.

87761069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7978290.

The product of its (nonzero) digits is 127008, while the sum is 44.

The square root of 87761069 is about 9368.0877984784. The cubic root of 87761069 is about 444.3930943011.

The spelling of 87761069 in words is "eighty-seven million, seven hundred sixty-one thousand, sixty-nine".