231490073 has 2 divisors, whose sum is σ = 231490074. Its totient is φ = 231490072.

The previous prime is 231490069. The next prime is 231490079. The reversal of 231490073 is 370094132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 189667984 + 41822089 = 13772^2 + 6467^2 .

It is a cyclic number.

It is not a de Polignac number, because 231490073 - 2² = 231490069 is a prime.

It is not a weakly prime, because it can be changed into another prime (231490079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115745036 + 115745037.

It is an arithmetic number, because the mean of its divisors is an integer number (115745037).

Almost surely, 2^231490073 is an apocalyptic number.

It is an amenable number.

231490073 is a deficient number, since it is larger than the sum of its proper divisors (1).

231490073 is an equidigital number, since it uses as much as digits as its factorization.

231490073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 231490073 is about 15214.7978297446. The cubic root of 231490073 is about 614.0128460214.

The spelling of 231490073 in words is "two hundred thirty-one million, four hundred ninety thousand, seventy-three".