349173157 has 2 divisors, whose sum is σ = 349173158. Its totient is φ = 349173156.

The previous prime is 349173103. The next prime is 349173229. The reversal of 349173157 is 751371943.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 349166596 + 6561 = 18686^2 + 81^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-349173157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (349179157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 174586578 + 174586579.

It is an arithmetic number, because the mean of its divisors is an integer number (174586579).

Almost surely, 2^349173157 is an apocalyptic number.

It is an amenable number.

349173157 is a deficient number, since it is larger than the sum of its proper divisors (1).

349173157 is an equidigital number, since it uses as much as digits as its factorization.

349173157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 79380, while the sum is 40.

The square root of 349173157 is about 18686.1755584175. The cubic root of 349173157 is about 704.1744823256.

The spelling of 349173157 in words is "three hundred forty-nine million, one hundred seventy-three thousand, one hundred fifty-seven".