73699861 has 2 divisors, whose sum is σ = 73699862. Its totient is φ = 73699860.

The previous prime is 73699859. The next prime is 73699907. The reversal of 73699861 is 16899637.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72760900 + 938961 = 8530^2 + 969^2 .

It is a cyclic number.

It is not a de Polignac number, because 73699861 - 2¹ = 73699859 is a prime.

It is a super-2 number, since 2×73699861² = 10863339022838642, which contains 22 as substring.

Together with 73699859, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73699831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36849930 + 36849931.

It is an arithmetic number, because the mean of its divisors is an integer number (36849931).

Almost surely, 2^73699861 is an apocalyptic number.

It is an amenable number.

73699861 is a deficient number, since it is larger than the sum of its proper divisors (1).

73699861 is an equidigital number, since it uses as much as digits as its factorization.

73699861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 489888, while the sum is 49.

The square root of 73699861 is about 8584.8623168924. The cubic root of 73699861 is about 419.2652706241.

The spelling of 73699861 in words is "seventy-three million, six hundred ninety-nine thousand, eight hundred sixty-one".