61870289 has 16 divisors (see below), whose sum is σ = 70822080. Its totient is φ = 53576640.

The previous prime is 61870273. The next prime is 61870301. The reversal of 61870289 is 98207816.

It is not a de Polignac number, because 61870289 - 2⁴ = 61870273 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (61870789) 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, 25259 + ... + 27599.

It is an arithmetic number, because the mean of its divisors is an integer number (4426380).

Almost surely, 2^61870289 is an apocalyptic number.

It is an amenable number.

61870289 is a deficient number, since it is larger than the sum of its proper divisors (8951791).

61870289 is a wasteful number, since it uses less digits than its factorization.

61870289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2480.

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 61870289 is about 7865.7669047589. The cubic root of 61870289 is about 395.5129563911.

It can be divided in two parts, 618 and 70289, that added together give a palindrome (70907).

The spelling of 61870289 in words is "sixty-one million, eight hundred seventy thousand, two hundred eighty-nine".