3420646477 has 4 divisors (see below), whose sum is σ = 3420799900. Its totient is φ = 3420493056.

The previous prime is 3420646451. The next prime is 3420646499. The reversal of 3420646477 is 7746460243.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2790586276 + 630060201 = 52826^2 + 25101^2 .

It is a cyclic number.

It is not a de Polignac number, because 3420646477 - 2¹⁵ = 3420613709 is a prime.

It is a super-2 number, since 2×3420646477² = 23401644641225023058, 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 (3420646777) 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, 36102 + ... + 90247.

It is an arithmetic number, because the mean of its divisors is an integer number (855199975).

Almost surely, 2^3420646477 is an apocalyptic number.

It is an amenable number.

3420646477 is a deficient number, since it is larger than the sum of its proper divisors (153423).

3420646477 is a wasteful number, since it uses less digits than its factorization.

3420646477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153422.

The product of its (nonzero) digits is 677376, while the sum is 43.

The square root of 3420646477 is about 58486.2930694022. The cubic root of 3420646477 is about 1506.7321809938.

The spelling of 3420646477 in words is "three billion, four hundred twenty million, six hundred forty-six thousand, four hundred seventy-seven".