73673861 has 2 divisors, whose sum is σ = 73673862. Its totient is φ = 73673860.

The previous prime is 73673839. The next prime is 73673867. The reversal of 73673861 is 16837637.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71081761 + 2592100 = 8431^2 + 1610^2 .

It is an emirp because it is prime and its reverse (16837637) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 73673861 - 2⁶ = 73673797 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 (73673867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36836930 + 36836931.

It is an arithmetic number, because the mean of its divisors is an integer number (36836931).

Almost surely, 2^73673861 is an apocalyptic number.

It is an amenable number.

73673861 is a deficient number, since it is larger than the sum of its proper divisors (1).

73673861 is an equidigital number, since it uses as much as digits as its factorization.

73673861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 127008, while the sum is 41.

The square root of 73673861 is about 8583.3478899553. The cubic root of 73673861 is about 419.2159617153.

The spelling of 73673861 in words is "seventy-three million, six hundred seventy-three thousand, eight hundred sixty-one".