1724138947 has 2 divisors, whose sum is σ = 1724138948. Its totient is φ = 1724138946.

The previous prime is 1724138921. The next prime is 1724138951. The reversal of 1724138947 is 7498314271.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1724138947 - 2²⁷ = 1589921219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1724138897 and 1724138906.

It is not a weakly prime, because it can be changed into another prime (1724138917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 862069473 + 862069474.

It is an arithmetic number, because the mean of its divisors is an integer number (862069474).

Almost surely, 2^1724138947 is an apocalyptic number.

1724138947 is a deficient number, since it is larger than the sum of its proper divisors (1).

1724138947 is an equidigital number, since it uses as much as digits as its factorization.

1724138947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 338688, while the sum is 46.

The square root of 1724138947 is about 41522.7521607130. The cubic root of 1724138947 is about 1199.1055712281.

The spelling of 1724138947 in words is "one billion, seven hundred twenty-four million, one hundred thirty-eight thousand, nine hundred forty-seven".