61887489 has 8 divisors (see below), whose sum is σ = 83869632. Its totient is φ = 40581840.

The previous prime is 61887487. The next prime is 61887493. The reversal of 61887489 is 98478816.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61887489 - 2¹ = 61887487 is a prime.

It is a super-2 number, since 2×61887489² = 7660122589450242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61887487) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 168909 + ... + 169274.

It is an arithmetic number, because the mean of its divisors is an integer number (10483704).

Almost surely, 2^61887489 is an apocalyptic number.

It is an amenable number.

61887489 is a deficient number, since it is larger than the sum of its proper divisors (21982143).

61887489 is a wasteful number, since it uses less digits than its factorization.

61887489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338247.

The product of its digits is 774144, while the sum is 51.

The square root of 61887489 is about 7866.8601741737. The cubic root of 61887489 is about 395.5496039897.

The spelling of 61887489 in words is "sixty-one million, eight hundred eighty-seven thousand, four hundred eighty-nine".