87773381 has 4 divisors (see below), whose sum is σ = 88312032. Its totient is φ = 87234732.

The previous prime is 87773351. The next prime is 87773419. The reversal of 87773381 is 18337778.

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, and also an emirpimes, since its reverse is a distinct semiprime: 18337778 = 2 ⋅9168889.

It is a cyclic number.

It is not a de Polignac number, because 87773381 - 2⁶ = 87773317 is a prime.

It is a super-2 number, since 2×87773381² = 15408332824342322, 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 (87773311) 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, 269081 + ... + 269406.

It is an arithmetic number, because the mean of its divisors is an integer number (22078008).

Almost surely, 2^87773381 is an apocalyptic number.

It is an amenable number.

87773381 is a deficient number, since it is larger than the sum of its proper divisors (538651).

87773381 is a wasteful number, since it uses less digits than its factorization.

87773381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538650.

The product of its digits is 197568, while the sum is 44.

The square root of 87773381 is about 9368.7448999319. The cubic root of 87773381 is about 444.4138746312.

The spelling of 87773381 in words is "eighty-seven million, seven hundred seventy-three thousand, three hundred eighty-one".