61122389 has 4 divisors (see below), whose sum is σ = 61959756. Its totient is φ = 60285024.

The previous prime is 61122371. The next prime is 61122443. The reversal of 61122389 is 98322116.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 35700625 + 25421764 = 5975^2 + 5042^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61122389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61122329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 418574 + ... + 418719.

It is an arithmetic number, because the mean of its divisors is an integer number (15489939).

Almost surely, 2^61122389 is an apocalyptic number.

It is an amenable number.

61122389 is a deficient number, since it is larger than the sum of its proper divisors (837367).

61122389 is an equidigital number, since it uses as much as digits as its factorization.

61122389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 837366.

The product of its digits is 5184, while the sum is 32.

The square root of 61122389 is about 7818.0809026257. The cubic root of 61122389 is about 393.9128123534.

The spelling of 61122389 in words is "sixty-one million, one hundred twenty-two thousand, three hundred eighty-nine".