61683553 has 4 divisors (see below), whose sum is σ = 61725888. Its totient is φ = 61641220.

The previous prime is 61683547. The next prime is 61683563. The reversal of 61683553 is 35538616.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61683553 - 2¹⁷ = 61552481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61683563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18901 + ... + 21922.

It is an arithmetic number, because the mean of its divisors is an integer number (15431472).

Almost surely, 2^61683553 is an apocalyptic number.

It is an amenable number.

61683553 is a deficient number, since it is larger than the sum of its proper divisors (42335).

61683553 is a wasteful number, since it uses less digits than its factorization.

61683553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42334.

The product of its digits is 64800, while the sum is 37.

The square root of 61683553 is about 7853.8877633946. The cubic root of 61683553 is about 395.1146449255.

The spelling of 61683553 in words is "sixty-one million, six hundred eighty-three thousand, five hundred fifty-three".