73470699781 has 2 divisors, whose sum is σ = 73470699782. Its totient is φ = 73470699780.

The previous prime is 73470699779. The next prime is 73470699787. The reversal of 73470699781 is 18799607437.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73281197025 + 189502756 = 270705^2 + 13766^2 .

It is a cyclic number.

It is not a de Polignac number, because 73470699781 - 2¹ = 73470699779 is a prime.

It is a super-2 number, since 2×73470699781² (a number of 23 digits) contains 22 as substring.

Together with 73470699779, 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 (73470699787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36735349890 + 36735349891.

It is an arithmetic number, because the mean of its divisors is an integer number (36735349891).

Almost surely, 2^73470699781 is an apocalyptic number.

It is an amenable number.

73470699781 is a deficient number, since it is larger than the sum of its proper divisors (1).

73470699781 is an equidigital number, since it uses as much as digits as its factorization.

73470699781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16003008, while the sum is 61.

The spelling of 73470699781 in words is "seventy-three billion, four hundred seventy million, six hundred ninety-nine thousand, seven hundred eighty-one".