61420973 has 2 divisors, whose sum is σ = 61420974. Its totient is φ = 61420972.

The previous prime is 61420967. The next prime is 61420981. The reversal of 61420973 is 37902416.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60171049 + 1249924 = 7757^2 + 1118^2 .

It is a cyclic number.

It is not a de Polignac number, because 61420973 - 2¹⁰ = 61419949 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61420943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30710486 + 30710487.

It is an arithmetic number, because the mean of its divisors is an integer number (30710487).

Almost surely, 2^61420973 is an apocalyptic number.

It is an amenable number.

61420973 is a deficient number, since it is larger than the sum of its proper divisors (1).

61420973 is an equidigital number, since it uses as much as digits as its factorization.

61420973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 61420973 is about 7837.1533735152. The cubic root of 61420973 is about 394.5531945127.

The spelling of 61420973 in words is "sixty-one million, four hundred twenty thousand, nine hundred seventy-three".