3497421321 has 15 divisors (see below), whose sum is σ = 5225338173. Its totient is φ = 2331259380.

The previous prime is 3497421307. The next prime is 3497421379. The reversal of 3497421321 is 1231247943.

It is a happy number.

The square root of 3497421321 is 59139.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 3497421321 - 2¹¹ = 3497419273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3497421391) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 528966 + ... + 535536.

Almost surely, 2^3497421321 is an apocalyptic number.

3497421321 is the 59139-th square number.

3497421321 is the 29570-th centered octagonal number.

It is an amenable number.

3497421321 is a deficient number, since it is larger than the sum of its proper divisors (1727916852).

3497421321 is an frugal number, since it uses more digits than its factorization.

3497421321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13154 (or 6574 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The cubic root of 3497421321 is about 1517.9215186972.

Multiplying 3497421321 by its sum of digits (36), we get a square (125907167556 = 354834²).

The spelling of 3497421321 in words is "three billion, four hundred ninety-seven million, four hundred twenty-one thousand, three hundred twenty-one".