1351438723 has 8 divisors (see below), whose sum is σ = 1360281600. Its totient is φ = 1342610568.

The previous prime is 1351438721. The next prime is 1351438733. The reversal of 1351438723 is 3278341531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1351438723 - 2¹ = 1351438721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1351438721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 225990 + ... + 231892.

It is an arithmetic number, because the mean of its divisors is an integer number (170035200).

Almost surely, 2^1351438723 is an apocalyptic number.

1351438723 is a deficient number, since it is larger than the sum of its proper divisors (8842877).

1351438723 is a wasteful number, since it uses less digits than its factorization.

1351438723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7361.

The product of its digits is 60480, while the sum is 37.

The square root of 1351438723 is about 36761.9194683847. The cubic root of 1351438723 is about 1105.6019250798.

The spelling of 1351438723 in words is "one billion, three hundred fifty-one million, four hundred thirty-eight thousand, seven hundred twenty-three".