1921405713 has 16 divisors (see below), whose sum is σ = 2570937600. Its totient is φ = 1276416000.

The previous prime is 1921405697. The next prime is 1921405729. The reversal of 1921405713 is 3175041291.

It is an interprime number because it is at equal distance from previous prime (1921405697) and next prime (1921405729).

It is not a de Polignac number, because 1921405713 - 2⁴ = 1921405697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1921405793) 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 15 ways as a sum of consecutive naturals, for example, 1732003 + ... + 1733111.

It is an arithmetic number, because the mean of its divisors is an integer number (160683600).

Almost surely, 2^1921405713 is an apocalyptic number.

It is an amenable number.

1921405713 is a deficient number, since it is larger than the sum of its proper divisors (649531887).

1921405713 is a wasteful number, since it uses less digits than its factorization.

1921405713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2632.

The product of its (nonzero) digits is 7560, while the sum is 33.

The square root of 1921405713 is about 43833.8420971742. The cubic root of 1921405713 is about 1243.1962531865.

The spelling of 1921405713 in words is "one billion, nine hundred twenty-one million, four hundred five thousand, seven hundred thirteen".