73420649 has 2 divisors, whose sum is σ = 73420650. Its totient is φ = 73420648.

The previous prime is 73420643. The next prime is 73420657. The reversal of 73420649 is 94602437.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60171049 + 13249600 = 7757^2 + 3640^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73420649 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (73420643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36710324 + 36710325.

It is an arithmetic number, because the mean of its divisors is an integer number (36710325).

Almost surely, 2^73420649 is an apocalyptic number.

It is an amenable number.

73420649 is a deficient number, since it is larger than the sum of its proper divisors (1).

73420649 is an equidigital number, since it uses as much as digits as its factorization.

73420649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 35.

The square root of 73420649 is about 8568.5850057054. The cubic root of 73420649 is about 418.7351382859.

The spelling of 73420649 in words is "seventy-three million, four hundred twenty thousand, six hundred forty-nine".