3509697493 has 8 divisors (see below), whose sum is σ = 3606261560. Its totient is φ = 3413223360.

The previous prime is 3509697469. The next prime is 3509697497. The reversal of 3509697493 is 3947969053.

It can be written as a sum of positive squares in 4 ways, for example, as 1025472529 + 2484224964 = 32023^2 + 49842^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-3509697493 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 (3509697497) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60823 + ... + 103531.

It is an arithmetic number, because the mean of its divisors is an integer number (450782695).

Almost surely, 2^3509697493 is an apocalyptic number.

It is an amenable number.

3509697493 is a deficient number, since it is larger than the sum of its proper divisors (96564067).

3509697493 is a wasteful number, since it uses less digits than its factorization.

3509697493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44967.

The product of its (nonzero) digits is 5511240, while the sum is 55.

The square root of 3509697493 is about 59242.6999131539. The cubic root of 3509697493 is about 1519.6954452435.

The spelling of 3509697493 in words is "three billion, five hundred nine million, six hundred ninety-seven thousand, four hundred ninety-three".