61550473 has 2 divisors, whose sum is σ = 61550474. Its totient is φ = 61550472.

The previous prime is 61550429. The next prime is 61550479. The reversal of 61550473 is 37405516.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38539264 + 23011209 = 6208^2 + 4797^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61550473 is a prime.

It is not a weakly prime, because it can be changed into another prime (61550479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30775236 + 30775237.

It is an arithmetic number, because the mean of its divisors is an integer number (30775237).

Almost surely, 2^61550473 is an apocalyptic number.

It is an amenable number.

61550473 is a deficient number, since it is larger than the sum of its proper divisors (1).

61550473 is an equidigital number, since it uses as much as digits as its factorization.

61550473 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 61550473 is about 7845.4109516328. The cubic root of 61550473 is about 394.8302918889.

Adding to 61550473 its reverse (37405516), we get a palindrome (98955989).

The spelling of 61550473 in words is "sixty-one million, five hundred fifty thousand, four hundred seventy-three".