3495477981 has 4 divisors (see below), whose sum is σ = 4660637312. Its totient is φ = 2330318652.

The previous prime is 3495477977. The next prime is 3495477983. The reversal of 3495477981 is 1897745943.

It is a happy number.

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 an emirpimes, since its reverse is a distinct semiprime: 1897745943 = 3 ⋅632581981.

It is not a de Polignac number, because 3495477981 - 2² = 3495477977 is a prime.

It is a super-2 number, since 2×3495477981² = 24436732631311672722, 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 (3495477983) 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, 582579661 + ... + 582579666.

It is an arithmetic number, because the mean of its divisors is an integer number (1165159328).

Almost surely, 2^3495477981 is an apocalyptic number.

It is an amenable number.

3495477981 is a deficient number, since it is larger than the sum of its proper divisors (1165159331).

3495477981 is a wasteful number, since it uses less digits than its factorization.

3495477981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1165159330.

The product of its digits is 7620480, while the sum is 57.

The square root of 3495477981 is about 59122.5674425595. The cubic root of 3495477981 is about 1517.6403225567.

The spelling of 3495477981 in words is "three billion, four hundred ninety-five million, four hundred seventy-seven thousand, nine hundred eighty-one".