87949551 has 16 divisors (see below), whose sum is σ = 127195488. Its totient is φ = 53836800.

The previous prime is 87949541. The next prime is 87949553. The reversal of 87949551 is 15594978.

It is not a de Polignac number, because 87949551 - 2⁹ = 87949039 is a prime.

It is a super-2 number, since 2×87949551² = 15470247042203202, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 87949551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87949553) 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, 18940 + ... + 23121.

It is an arithmetic number, because the mean of its divisors is an integer number (7949718).

Almost surely, 2^87949551 is an apocalyptic number.

87949551 is a deficient number, since it is larger than the sum of its proper divisors (39245937).

87949551 is a wasteful number, since it uses less digits than its factorization.

87949551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42122.

The product of its digits is 453600, while the sum is 48.

The square root of 87949551 is about 9378.1421934198. The cubic root of 87949551 is about 444.7110037057.

The spelling of 87949551 in words is "eighty-seven million, nine hundred forty-nine thousand, five hundred fifty-one".