61989952 has 14 divisors (see below), whose sum is σ = 123011438. Its totient is φ = 30994944.

The previous prime is 61989937. The next prime is 61989953. The reversal of 61989952 is 25998916.

It can be written as a sum of positive squares in only one way, i.e., 61842496 + 147456 = 7864^2 + 384^2 .

It is a junction number, because it is equal to n+sod(n) for n = 61989896 and 61989905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61989953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 484233 + ... + 484360.

Almost surely, 2^61989952 is an apocalyptic number.

It is an amenable number.

61989952 is a deficient number, since it is larger than the sum of its proper divisors (61021486).

61989952 is an equidigital number, since it uses as much as digits as its factorization.

61989952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 968605 (or 968595 counting only the distinct ones).

The product of its digits is 349920, while the sum is 49.

The square root of 61989952 is about 7873.3697995204. The cubic root of 61989952 is about 395.7677786866.

The spelling of 61989952 in words is "sixty-one million, nine hundred eighty-nine thousand, nine hundred fifty-two".