61223389 has 2 divisors, whose sum is σ = 61223390. Its totient is φ = 61223388.

The previous prime is 61223387. The next prime is 61223411. The reversal of 61223389 is 98332216.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54243225 + 6980164 = 7365^2 + 2642^2 .

It is a cyclic number.

It is not a de Polignac number, because 61223389 - 2¹ = 61223387 is a prime.

Together with 61223387, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61223381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30611694 + 30611695.

It is an arithmetic number, because the mean of its divisors is an integer number (30611695).

Almost surely, 2^61223389 is an apocalyptic number.

It is an amenable number.

61223389 is a deficient number, since it is larger than the sum of its proper divisors (1).

61223389 is an equidigital number, since it uses as much as digits as its factorization.

61223389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 34.

The square root of 61223389 is about 7824.5376221218. The cubic root of 61223389 is about 394.1296630623.

The spelling of 61223389 in words is "sixty-one million, two hundred twenty-three thousand, three hundred eighty-nine".