1239342473 has 4 divisors (see below), whose sum is σ = 1241033988. Its totient is φ = 1237650960.

The previous prime is 1239342451. The next prime is 1239342493. The reversal of 1239342473 is 3742439321.

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 784672144 + 454670329 = 28012^2 + 21323^2 .

It is a cyclic number.

It is not a de Polignac number, because 1239342473 - 2⁶ = 1239342409 is a prime.

It is a super-3 number, since 3×1239342473³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1239342443) 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, 844658 + ... + 846123.

It is an arithmetic number, because the mean of its divisors is an integer number (310258497).

Almost surely, 2^1239342473 is an apocalyptic number.

It is an amenable number.

1239342473 is a deficient number, since it is larger than the sum of its proper divisors (1691515).

1239342473 is an equidigital number, since it uses as much as digits as its factorization.

1239342473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1691514.

The product of its digits is 108864, while the sum is 38.

The square root of 1239342473 is about 35204.2962292957. The cubic root of 1239342473 is about 1074.1471434275.

The spelling of 1239342473 in words is "one billion, two hundred thirty-nine million, three hundred forty-two thousand, four hundred seventy-three".