61609489 has 4 divisors (see below), whose sum is σ = 62351856. Its totient is φ = 60867124.

The previous prime is 61609441. The next prime is 61609501. The reversal of 61609489 is 98490616.

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 61609489 - 2⁹ = 61608977 is a prime.

It is a super-2 number, since 2×61609489² = 7591458269682242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61609409) 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 in 3 ways as a sum of consecutive naturals, for example, 371059 + ... + 371224.

It is an arithmetic number, because the mean of its divisors is an integer number (15587964).

Almost surely, 2^61609489 is an apocalyptic number.

It is an amenable number.

61609489 is a deficient number, since it is larger than the sum of its proper divisors (742367).

61609489 is an equidigital number, since it uses as much as digits as its factorization.

61609489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 742366.

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 61609489 is about 7849.1712301363. The cubic root of 61609489 is about 394.9564423475.

The spelling of 61609489 in words is "sixty-one million, six hundred nine thousand, four hundred eighty-nine".