53991377 has 8 divisors (see below), whose sum is σ = 59062080. Its totient is φ = 48947760.

The previous prime is 53991361. The next prime is 53991401. The reversal of 53991377 is 77319935.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 53991377 - 2⁴ = 53991361 is a prime.

It is a super-2 number, since 2×53991377² = 5830137580712258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (53991317) 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 7 ways as a sum of consecutive naturals, for example, 2477 + ... + 10682.

It is an arithmetic number, because the mean of its divisors is an integer number (7382760).

Almost surely, 2^53991377 is an apocalyptic number.

It is an amenable number.

53991377 is a deficient number, since it is larger than the sum of its proper divisors (5070703).

53991377 is a wasteful number, since it uses less digits than its factorization.

53991377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13543.

The product of its digits is 178605, while the sum is 44.

The square root of 53991377 is about 7347.8824840902. The cubic root of 53991377 is about 377.9561948248.

It can be divided in two parts, 5399 and 1377, that added together give a palindrome (6776).

The spelling of 53991377 in words is "fifty-three million, nine hundred ninety-one thousand, three hundred seventy-seven".