87949718 has 4 divisors (see below), whose sum is σ = 131924580. Its totient is φ = 43974858.

The previous prime is 87949717. The next prime is 87949733. The reversal of 87949718 is 81794978.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 87949718.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87949717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21987428 + ... + 21987431.

It is an arithmetic number, because the mean of its divisors is an integer number (32981145).

Almost surely, 2^87949718 is an apocalyptic number.

87949718 is a deficient number, since it is larger than the sum of its proper divisors (43974862).

87949718 is a wasteful number, since it uses less digits than its factorization.

87949718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43974861.

The product of its digits is 1016064, while the sum is 53.

The square root of 87949718 is about 9378.1510970980. The cubic root of 87949718 is about 444.7112851803.

The spelling of 87949718 in words is "eighty-seven million, nine hundred forty-nine thousand, seven hundred eighteen".