73772381 has 2 divisors, whose sum is σ = 73772382. Its totient is φ = 73772380.

The previous prime is 73772357. The next prime is 73772393. The reversal of 73772381 is 18327737.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55204900 + 18567481 = 7430^2 + 4309^2 .

It is a cyclic number.

It is not a de Polignac number, because 73772381 - 2¹⁸ = 73510237 is a prime.

It is a super-2 number, since 2×73772381² = 10884728396818322, which contains 22 as substring.

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 (73772341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36886190 + 36886191.

It is an arithmetic number, because the mean of its divisors is an integer number (36886191).

Almost surely, 2^73772381 is an apocalyptic number.

It is an amenable number.

73772381 is a deficient number, since it is larger than the sum of its proper divisors (1).

73772381 is an equidigital number, since it uses as much as digits as its factorization.

73772381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 49392, while the sum is 38.

The square root of 73772381 is about 8589.0849920117. The cubic root of 73772381 is about 419.4027432945.

The spelling of 73772381 in words is "seventy-three million, seven hundred seventy-two thousand, three hundred eighty-one".