55987623 has 24 divisors (see below), whose sum is σ = 87438000. Its totient is φ = 34401024.

The previous prime is 55987621. The next prime is 55987649. The reversal of 55987623 is 32678955.

It is a happy number.

55987623 is a `hidden beast` number, since 559 + 8 + 76 + 23 = 666.

It is not a de Polignac number, because 55987623 - 2¹ = 55987621 is a prime.

It is a super-2 number, since 2×55987623² = 6269227858380258, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55987621) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1903 + ... + 10751.

It is an arithmetic number, because the mean of its divisors is an integer number (3643250).

Almost surely, 2^55987623 is an apocalyptic number.

55987623 is a deficient number, since it is larger than the sum of its proper divisors (31450377).

55987623 is a wasteful number, since it uses less digits than its factorization.

55987623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8911 (or 8908 counting only the distinct ones).

The product of its digits is 453600, while the sum is 45.

The square root of 55987623 is about 7482.4877547511. The cubic root of 55987623 is about 382.5580483476.

The spelling of 55987623 in words is "fifty-five million, nine hundred eighty-seven thousand, six hundred twenty-three".