3907601921 has 4 divisors (see below), whose sum is σ = 4113265200. Its totient is φ = 3701938644.

The previous prime is 3907601917. The next prime is 3907601923. The reversal of 3907601921 is 1291067093.

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: 1291067093 = 3853 ⋅335081.

It is not a de Polignac number, because 3907601921 - 2² = 3907601917 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3907601923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102831611 + ... + 102831648.

It is an arithmetic number, because the mean of its divisors is an integer number (1028316300).

Almost surely, 2^3907601921 is an apocalyptic number.

It is an amenable number.

3907601921 is a deficient number, since it is larger than the sum of its proper divisors (205663279).

3907601921 is a wasteful number, since it uses less digits than its factorization.

3907601921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205663278.

The product of its (nonzero) digits is 20412, while the sum is 38.

The square root of 3907601921 is about 62510.8144323844. The cubic root of 3907601921 is about 1575.0829782099.

The spelling of 3907601921 in words is "three billion, nine hundred seven million, six hundred one thousand, nine hundred twenty-one".