61264989 has 6 divisors (see below), whose sum is σ = 88493886. Its totient is φ = 40843320.

The previous prime is 61264967. The next prime is 61264993. The reversal of 61264989 is 98946216.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 37088100 + 24176889 = 6090^2 + 4917^2 .

It is not a de Polignac number, because 61264989 - 2⁹ = 61264477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61264919) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3403602 + ... + 3403619.

It is an arithmetic number, because the mean of its divisors is an integer number (14748981).

Almost surely, 2^61264989 is an apocalyptic number.

It is an amenable number.

61264989 is a deficient number, since it is larger than the sum of its proper divisors (27228897).

61264989 is a wasteful number, since it uses less digits than its factorization.

61264989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6807227 (or 6807224 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 61264989 is about 7827.1954747534. The cubic root of 61264989 is about 394.2189104459.

The spelling of 61264989 in words is "sixty-one million, two hundred sixty-four thousand, nine hundred eighty-nine".