73781069 has 2 divisors, whose sum is σ = 73781070. Its totient is φ = 73781068.

The previous prime is 73781053. The next prime is 73781087. The reversal of 73781069 is 96018737.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71605444 + 2175625 = 8462^2 + 1475^2 .

It is a cyclic number.

It is not a de Polignac number, because 73781069 - 2⁴ = 73781053 is a prime.

It is a super-2 number, since 2×73781069² = 10887292285565522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73781369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36890534 + 36890535.

It is an arithmetic number, because the mean of its divisors is an integer number (36890535).

Almost surely, 2^73781069 is an apocalyptic number.

It is an amenable number.

73781069 is a deficient number, since it is larger than the sum of its proper divisors (1).

73781069 is an equidigital number, since it uses as much as digits as its factorization.

73781069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63504, while the sum is 41.

The square root of 73781069 is about 8589.5907353028. The cubic root of 73781069 is about 419.4192066735.

The spelling of 73781069 in words is "seventy-three million, seven hundred eighty-one thousand, sixty-nine".