3495920621 has 4 divisors (see below), whose sum is σ = 3496040544. Its totient is φ = 3495800700.

The previous prime is 3495920539. The next prime is 3495920629. The reversal of 3495920621 is 1260295943.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1260295943 = 7121 ⋅176983.

It is a cyclic number.

It is not a de Polignac number, because 3495920621 - 2¹⁰ = 3495919597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3495920629) 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, 15026 + ... + 84956.

It is an arithmetic number, because the mean of its divisors is an integer number (874010136).

Almost surely, 2^3495920621 is an apocalyptic number.

It is an amenable number.

3495920621 is a deficient number, since it is larger than the sum of its proper divisors (119923).

3495920621 is an equidigital number, since it uses as much as digits as its factorization.

3495920621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119922.

The product of its (nonzero) digits is 116640, while the sum is 41.

The square root of 3495920621 is about 59126.3107338856. The cubic root of 3495920621 is about 1517.7043805541.

The spelling of 3495920621 in words is "three billion, four hundred ninety-five million, nine hundred twenty thousand, six hundred twenty-one".