61389233 has 2 divisors, whose sum is σ = 61389234. Its totient is φ = 61389232.

The previous prime is 61389187. The next prime is 61389271. The reversal of 61389233 is 33298316.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31719424 + 29669809 = 5632^2 + 5447^2 .

It is a cyclic number.

It is not a de Polignac number, because 61389233 - 2⁶ = 61389169 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61389193 and 61389202.

It is not a weakly prime, because it can be changed into another prime (61389733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30694616 + 30694617.

It is an arithmetic number, because the mean of its divisors is an integer number (30694617).

Almost surely, 2^61389233 is an apocalyptic number.

It is an amenable number.

61389233 is a deficient number, since it is larger than the sum of its proper divisors (1).

61389233 is an equidigital number, since it uses as much as digits as its factorization.

61389233 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 35.

The square root of 61389233 is about 7835.1281419004. The cubic root of 61389233 is about 394.4852194897.

The spelling of 61389233 in words is "sixty-one million, three hundred eighty-nine thousand, two hundred thirty-three".