349745731 has 2 divisors, whose sum is σ = 349745732. Its totient is φ = 349745730.

The previous prime is 349745717. The next prime is 349745801. The reversal of 349745731 is 137547943.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 349745731 - 2²³ = 341357123 is a prime.

It is a super-2 number, since 2×349745731² = 244644152705448722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (349746731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 174872865 + 174872866.

It is an arithmetic number, because the mean of its divisors is an integer number (174872866).

Almost surely, 2^349745731 is an apocalyptic number.

349745731 is a deficient number, since it is larger than the sum of its proper divisors (1).

349745731 is an equidigital number, since it uses as much as digits as its factorization.

349745731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 317520, while the sum is 43.

The square root of 349745731 is about 18701.4900743230. The cubic root of 349745731 is about 704.5591738058.

The spelling of 349745731 in words is "three hundred forty-nine million, seven hundred forty-five thousand, seven hundred thirty-one".