337991421 has 8 divisors (see below), whose sum is σ = 453420640. Its totient is φ = 223944912.

The previous prime is 337991369. The next prime is 337991461. The reversal of 337991421 is 124199733.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 337991421 - 2¹⁷ = 337860349 is a prime.

It is a super-2 number, since 2×337991421² = 228476401339198482, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 337991421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (337991461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 345106 + ... + 346083.

It is an arithmetic number, because the mean of its divisors is an integer number (56677580).

Almost surely, 2^337991421 is an apocalyptic number.

It is an amenable number.

337991421 is a deficient number, since it is larger than the sum of its proper divisors (115429219).

337991421 is a wasteful number, since it uses less digits than its factorization.

337991421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691355.

The product of its digits is 40824, while the sum is 39.

The square root of 337991421 is about 18384.5429913283. The cubic root of 337991421 is about 696.5760832702.

The spelling of 337991421 in words is "three hundred thirty-seven million, nine hundred ninety-one thousand, four hundred twenty-one".