3659138949 has 8 divisors (see below), whose sum is σ = 4879131552. Its totient is φ = 2439286160.

The previous prime is 3659138941. The next prime is 3659138957. The reversal of 3659138949 is 9498319563.

It is an interprime number because it is at equal distance from previous prime (3659138941) and next prime (3659138957).

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

It is a cyclic number.

It is not a de Polignac number, because 3659138949 - 2³ = 3659138941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3659138941) 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, 82519 + ... + 118859.

It is an arithmetic number, because the mean of its divisors is an integer number (609891444).

Almost surely, 2^3659138949 is an apocalyptic number.

It is an amenable number.

3659138949 is a deficient number, since it is larger than the sum of its proper divisors (1219992603).

3659138949 is a wasteful number, since it uses less digits than its factorization.

3659138949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69907.

The product of its digits is 6298560, while the sum is 57.

The square root of 3659138949 is about 60490.8170634188. The cubic root of 3659138949 is about 1540.9656827669.

The spelling of 3659138949 in words is "three billion, six hundred fifty-nine million, one hundred thirty-eight thousand, nine hundred forty-nine".