3926961021 has 32 divisors (see below), whose sum is σ = 5709168000. Its totient is φ = 2391475968.

The previous prime is 3926960987. The next prime is 3926961029. The reversal of 3926961021 is 1201696293.

It is not a de Polignac number, because 3926961021 - 2⁶ = 3926960957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3926961029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2030571 + ... + 2032503.

It is an arithmetic number, because the mean of its divisors is an integer number (178411500).

Almost surely, 2^3926961021 is an apocalyptic number.

It is an amenable number.

3926961021 is a deficient number, since it is larger than the sum of its proper divisors (1782206979).

3926961021 is a wasteful number, since it uses less digits than its factorization.

3926961021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3213.

The product of its (nonzero) digits is 34992, while the sum is 39.

The square root of 3926961021 is about 62665.4691277421. The cubic root of 3926961021 is about 1577.6797944230.

The spelling of 3926961021 in words is "three billion, nine hundred twenty-six million, nine hundred sixty-one thousand, twenty-one".