53997765 has 8 divisors (see below), whose sum is σ = 86396448. Its totient is φ = 28798800.

The previous prime is 53997761. The next prime is 53997773. The reversal of 53997765 is 56779935.

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

It is not a de Polignac number, because 53997765 - 2² = 53997761 is a prime.

It is a super-3 number, since 3×53997765³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53997761) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1799911 + ... + 1799940.

It is an arithmetic number, because the mean of its divisors is an integer number (10799556).

Almost surely, 2^53997765 is an apocalyptic number.

It is an amenable number.

53997765 is a deficient number, since it is larger than the sum of its proper divisors (32398683).

53997765 is a wasteful number, since it uses less digits than its factorization.

53997765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3599859.

The product of its digits is 1786050, while the sum is 51.

The square root of 53997765 is about 7348.3171542878. The cubic root of 53997765 is about 377.9711002233.

The spelling of 53997765 in words is "fifty-three million, nine hundred ninety-seven thousand, seven hundred sixty-five".