1621479005 has 16 divisors (see below), whose sum is σ = 1981238400. Its totient is φ = 1273596480.

The previous prime is 1621478983. The next prime is 1621479011. The reversal of 1621479005 is 5009741261.

It is not a de Polignac number, because 1621479005 - 2²² = 1617284701 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 268115 + ... + 274095.

It is an arithmetic number, because the mean of its divisors is an integer number (123827400).

Almost surely, 2^1621479005 is an apocalyptic number.

It is an amenable number.

1621479005 is a deficient number, since it is larger than the sum of its proper divisors (359759395).

1621479005 is an equidigital number, since it uses as much as digits as its factorization.

1621479005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6964.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 1621479005 is about 40267.5924907363. The cubic root of 1621479005 is about 1174.8175977612.

The spelling of 1621479005 in words is "one billion, six hundred twenty-one million, four hundred seventy-nine thousand, five".