53640977 has 8 divisors (see below), whose sum is σ = 57836520. Its totient is φ = 49455360.

The previous prime is 53640973. The next prime is 53641031. The reversal of 53640977 is 77904635.

It is a Cunningham number, because it is equal to 7324²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 7929856 + 45711121 = 2816^2 + 6761^2 .

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 53640977 - 2² = 53640973 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53640973) 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, 11849 + ... + 15737.

It is an arithmetic number, because the mean of its divisors is an integer number (7229565).

Almost surely, 2^53640977 is an apocalyptic number.

It is an amenable number.

53640977 is a deficient number, since it is larger than the sum of its proper divisors (4195543).

53640977 is a wasteful number, since it uses less digits than its factorization.

53640977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4963.

The product of its (nonzero) digits is 158760, while the sum is 41.

The square root of 53640977 is about 7324.0000682687. Note that the first 4 decimals coincide. The cubic root of 53640977 is about 377.1367838059.

The spelling of 53640977 in words is "fifty-three million, six hundred forty thousand, nine hundred seventy-seven".