87781941 has 16 divisors (see below), whose sum is σ = 140051520. Its totient is φ = 54019440.

The previous prime is 87781937. The next prime is 87781949. The reversal of 87781941 is 14918778.

It is not a de Polignac number, because 87781941 - 2² = 87781937 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87781949) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124695 + ... + 125396.

It is an arithmetic number, because the mean of its divisors is an integer number (8753220).

Almost surely, 2^87781941 is an apocalyptic number.

It is an amenable number.

87781941 is a deficient number, since it is larger than the sum of its proper divisors (52269579).

87781941 is a wasteful number, since it uses less digits than its factorization.

87781941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250113 (or 250107 counting only the distinct ones).

The product of its digits is 112896, while the sum is 45.

The square root of 87781941 is about 9369.2017269349. The cubic root of 87781941 is about 444.4283211489.

The spelling of 87781941 in words is "eighty-seven million, seven hundred eighty-one thousand, nine hundred forty-one".