73958681 has 2 divisors, whose sum is σ = 73958682. Its totient is φ = 73958680.

The previous prime is 73958669. The next prime is 73958699. The reversal of 73958681 is 18685937.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70291456 + 3667225 = 8384^2 + 1915^2 .

It is a cyclic number.

It is not a de Polignac number, because 73958681 - 2⁶ = 73958617 is a prime.

It is a super-2 number, since 2×73958681² = 10939772990519522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (73958611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36979340 + 36979341.

It is an arithmetic number, because the mean of its divisors is an integer number (36979341).

Almost surely, 2^73958681 is an apocalyptic number.

It is an amenable number.

73958681 is a deficient number, since it is larger than the sum of its proper divisors (1).

73958681 is an equidigital number, since it uses as much as digits as its factorization.

73958681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880, while the sum is 47.

The square root of 73958681 is about 8599.9233136116. The cubic root of 73958681 is about 419.7554907139.

The spelling of 73958681 in words is "seventy-three million, nine hundred fifty-eight thousand, six hundred eighty-one".