349979581 has 12 divisors (see below), whose sum is σ = 402239136. Its totient is φ = 298294920.

The previous prime is 349979579. The next prime is 349979603. The reversal of 349979581 is 185979943.

It is not a de Polignac number, because 349979581 - 2¹ = 349979579 is a prime.

It is a super-2 number, since 2×349979581² = 244971414233871122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (349979501) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 311086 + ... + 312208.

It is an arithmetic number, because the mean of its divisors is an integer number (33519928).

Almost surely, 2^349979581 is an apocalyptic number.

It is an amenable number.

349979581 is a deficient number, since it is larger than the sum of its proper divisors (52259555).

349979581 is an equidigital number, since it uses as much as digits as its factorization.

349979581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1552 (or 1341 counting only the distinct ones).

The product of its digits is 2449440, while the sum is 55.

The square root of 349979581 is about 18707.7412051803. The cubic root of 349979581 is about 704.7161682930.

The spelling of 349979581 in words is "three hundred forty-nine million, nine hundred seventy-nine thousand, five hundred eighty-one".