61989153 has 16 divisors (see below), whose sum is σ = 90004800. Its totient is φ = 37800000.

The previous prime is 61989149. The next prime is 61989173. The reversal of 61989153 is 35198916.

It is not a de Polignac number, because 61989153 - 2² = 61989149 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (61989143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17098 + ... + 20403.

It is an arithmetic number, because the mean of its divisors is an integer number (5625300).

Almost surely, 2^61989153 is an apocalyptic number.

It is an amenable number.

61989153 is a deficient number, since it is larger than the sum of its proper divisors (28015647).

61989153 is a wasteful number, since it uses less digits than its factorization.

61989153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37552.

The product of its digits is 58320, while the sum is 42.

The square root of 61989153 is about 7873.3190586944. The cubic root of 61989153 is about 395.7660783045.

It can be divided in two parts, 6198 and 9153, that added together give a palindrome (15351).

The spelling of 61989153 in words is "sixty-one million, nine hundred eighty-nine thousand, one hundred fifty-three".