61604953 has 2 divisors, whose sum is σ = 61604954. Its totient is φ = 61604952.

The previous prime is 61604941. The next prime is 61604993. The reversal of 61604953 is 35940616.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53465344 + 8139609 = 7312^2 + 2853^2 .

It is a cyclic number.

It is not a de Polignac number, because 61604953 - 2¹³ = 61596761 is a prime.

It is not a weakly prime, because it can be changed into another prime (61604993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30802476 + 30802477.

It is an arithmetic number, because the mean of its divisors is an integer number (30802477).

Almost surely, 2^61604953 is an apocalyptic number.

It is an amenable number.

61604953 is a deficient number, since it is larger than the sum of its proper divisors (1).

61604953 is an equidigital number, since it uses as much as digits as its factorization.

61604953 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 61604953 is about 7848.8822771144. The cubic root of 61604953 is about 394.9467492173.

The spelling of 61604953 in words is "sixty-one million, six hundred four thousand, nine hundred fifty-three".