3685121954 has 4 divisors (see below), whose sum is σ = 5527682934. Its totient is φ = 1842560976.

The previous prime is 3685121933. The next prime is 3685121971. The reversal of 3685121954 is 4591215863.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 3593403025 + 91718929 = 59945^2 + 9577^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 921280487 + ... + 921280490.

Almost surely, 2^3685121954 is an apocalyptic number.

3685121954 is a deficient number, since it is larger than the sum of its proper divisors (1842560980).

3685121954 is a wasteful number, since it uses less digits than its factorization.

3685121954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1842560979.

The product of its digits is 259200, while the sum is 44.

The square root of 3685121954 is about 60705.2053287031. The cubic root of 3685121954 is about 1544.6044733446.

The spelling of 3685121954 in words is "three billion, six hundred eighty-five million, one hundred twenty-one thousand, nine hundred fifty-four".