3397979781 has 64 divisors (see below), whose sum is σ = 5955747840. Its totient is φ = 1873704960.

The previous prime is 3397979777. The next prime is 3397979797. The reversal of 3397979781 is 1879797933.

It is not a de Polignac number, because 3397979781 - 2² = 3397979777 is a prime.

It is a super-2 number, since 2×3397979781² = 23092533184169615922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3397979701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2946501 + ... + 2947653.

It is an arithmetic number, because the mean of its divisors is an integer number (93058560).

Almost surely, 2^3397979781 is an apocalyptic number.

3397979781 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

3397979781 is a deficient number, since it is larger than the sum of its proper divisors (2557768059).

3397979781 is a wasteful number, since it uses less digits than its factorization.

3397979781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1703 (or 1697 counting only the distinct ones).

The product of its digits is 18003384, while the sum is 63.

The square root of 3397979781 is about 58292.1931393905. The cubic root of 3397979781 is about 1503.3967144148.

The spelling of 3397979781 in words is "three billion, three hundred ninety-seven million, nine hundred seventy-nine thousand, seven hundred eighty-one".