712538381 has 4 divisors (see below), whose sum is σ = 737108700. Its totient is φ = 687968064.

The previous prime is 712538371. The next prime is 712538389. The reversal of 712538381 is 183835217.

It is a happy number.

712538381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 442429156 + 270109225 = 21034^2 + 16435^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-712538381 is a prime.

It is a super-2 number, since 2×712538381² = 1015421888796202322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (712538389) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12285116 + ... + 12285173.

It is an arithmetic number, because the mean of its divisors is an integer number (184277175).

Almost surely, 2^712538381 is an apocalyptic number.

It is an amenable number.

712538381 is a deficient number, since it is larger than the sum of its proper divisors (24570319).

712538381 is a wasteful number, since it uses less digits than its factorization.

712538381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24570318.

The product of its digits is 40320, while the sum is 38.

The square root of 712538381 is about 26693.4145623972. The cubic root of 712538381 is about 893.1740311319.

The spelling of 712538381 in words is "seven hundred twelve million, five hundred thirty-eight thousand, three hundred eighty-one".