73047431 has 2 divisors, whose sum is σ = 73047432. Its totient is φ = 73047430.

The previous prime is 73047421. The next prime is 73047449. The reversal of 73047431 is 13474037.

It is a weak prime.

It is an emirp because it is prime and its reverse (13474037) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 73047431 - 2¹⁴ = 73031047 is a prime.

It is a super-2 number, since 2×73047431² = 10671854351399522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is equal to p_4286720 and since 73047431 and 4286720 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 73047394 and 73047403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73047421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36523715 + 36523716.

It is an arithmetic number, because the mean of its divisors is an integer number (36523716).

Almost surely, 2^73047431 is an apocalyptic number.

73047431 is a deficient number, since it is larger than the sum of its proper divisors (1).

73047431 is an equidigital number, since it uses as much as digits as its factorization.

73047431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7056, while the sum is 29.

The square root of 73047431 is about 8546.7789839214. The cubic root of 73047431 is about 418.0244161314.

The spelling of 73047431 in words is "seventy-three million, forty-seven thousand, four hundred thirty-one".