53989951 has 4 divisors (see below), whose sum is σ = 54145000. Its totient is φ = 53834904.

The previous prime is 53989939. The next prime is 53989961. The reversal of 53989951 is 15998935.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15998935 = 5 ⋅3199787.

It is a cyclic number.

It is not a de Polignac number, because 53989951 - 2⁷ = 53989823 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 53989895 and 53989904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53989921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77001 + ... + 77698.

It is an arithmetic number, because the mean of its divisors is an integer number (13536250).

Almost surely, 2^53989951 is an apocalyptic number.

53989951 is a deficient number, since it is larger than the sum of its proper divisors (155049).

53989951 is a wasteful number, since it uses less digits than its factorization.

53989951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155048.

The product of its digits is 437400, while the sum is 49.

The square root of 53989951 is about 7347.7854486913. The cubic root of 53989951 is about 377.9528673165.

The spelling of 53989951 in words is "fifty-three million, nine hundred eighty-nine thousand, nine hundred fifty-one".