1001479621 has 2 divisors, whose sum is σ = 1001479622. Its totient is φ = 1001479620.

The previous prime is 1001479613. The next prime is 1001479631. The reversal of 1001479621 is 1269741001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 991557121 + 9922500 = 31489^2 + 3150^2 .

It is a cyclic number.

It is not a de Polignac number, because 1001479621 - 2³ = 1001479613 is a prime.

It is a super-3 number, since 3×1001479621³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1001479631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500739810 + 500739811.

It is an arithmetic number, because the mean of its divisors is an integer number (500739811).

Almost surely, 2^1001479621 is an apocalyptic number.

It is an amenable number.

1001479621 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001479621 is an equidigital number, since it uses as much as digits as its factorization.

1001479621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 1001479621 is about 31646.1628163669. The cubic root of 1001479621 is about 1000.4929639466.

The spelling of 1001479621 in words is "one billion, one million, four hundred seventy-nine thousand, six hundred twenty-one".