61604233 has 2 divisors, whose sum is σ = 61604234. Its totient is φ = 61604232.

The previous prime is 61604227. The next prime is 61604237. The reversal of 61604233 is 33240616.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41641209 + 19963024 = 6453^2 + 4468^2 .

It is a cyclic number.

It is not a de Polignac number, because 61604233 - 2¹⁷ = 61473161 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61604198 and 61604207.

It is not a weakly prime, because it can be changed into another prime (61604237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30802116 + 30802117.

It is an arithmetic number, because the mean of its divisors is an integer number (30802117).

Almost surely, 2^61604233 is an apocalyptic number.

It is an amenable number.

61604233 is a deficient number, since it is larger than the sum of its proper divisors (1).

61604233 is an equidigital number, since it uses as much as digits as its factorization.

61604233 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 61604233 is about 7848.8364105770. The cubic root of 61604233 is about 394.9452105815.

Adding to 61604233 its reverse (33240616), we get a palindrome (94844849).

The spelling of 61604233 in words is "sixty-one million, six hundred four thousand, two hundred thirty-three".