73621573 has 2 divisors, whose sum is σ = 73621574. Its totient is φ = 73621572.

The previous prime is 73621567. The next prime is 73621579. The reversal of 73621573 is 37512637.

It is a balanced prime because it is at equal distance from previous prime (73621567) and next prime (73621579).

It can be written as a sum of positive squares in only one way, i.e., 73564929 + 56644 = 8577^2 + 238^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73621573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73621579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36810786 + 36810787.

It is an arithmetic number, because the mean of its divisors is an integer number (36810787).

Almost surely, 2^73621573 is an apocalyptic number.

It is an amenable number.

73621573 is a deficient number, since it is larger than the sum of its proper divisors (1).

73621573 is an equidigital number, since it uses as much as digits as its factorization.

73621573 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26460, while the sum is 34.

The square root of 73621573 is about 8580.3014515808. The cubic root of 73621573 is about 419.1167625708.

The spelling of 73621573 in words is "seventy-three million, six hundred twenty-one thousand, five hundred seventy-three".