349740551 has 4 divisors (see below), whose sum is σ = 361800600. Its totient is φ = 337680504.

The previous prime is 349740509. The next prime is 349740563. The reversal of 349740551 is 155047943.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 155047943 = 10429 ⋅14867.

It is a cyclic number.

It is not a de Polignac number, because 349740551 - 2²² = 345546247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (349740151) 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, 6029981 + ... + 6030038.

It is an arithmetic number, because the mean of its divisors is an integer number (90450150).

Almost surely, 2^349740551 is an apocalyptic number.

349740551 is a deficient number, since it is larger than the sum of its proper divisors (12060049).

349740551 is a wasteful number, since it uses less digits than its factorization.

349740551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12060048.

The product of its (nonzero) digits is 75600, while the sum is 38.

The square root of 349740551 is about 18701.3515821718. The cubic root of 349740551 is about 704.5556954364. Note that the first 3 decimals are identical.

The spelling of 349740551 in words is "three hundred forty-nine million, seven hundred forty thousand, five hundred fifty-one".