921466013 has 4 divisors (see below), whose sum is σ = 992348028. Its totient is φ = 850584000.

The previous prime is 921465991. The next prime is 921466031. The reversal of 921466013 is 310664129.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 310664129 = 73 ⋅4255673.

It can be written as a sum of positive squares in 2 ways, for example, as 312511684 + 608954329 = 17678^2 + 24677^2 .

It is a cyclic number.

It is not a de Polignac number, because 921466013 - 2¹⁰ = 921464989 is a prime.

It is a super-2 number, since 2×921466013² = 1698199226228232338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (921460013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35440988 + ... + 35441013.

It is an arithmetic number, because the mean of its divisors is an integer number (248087007).

Almost surely, 2^921466013 is an apocalyptic number.

It is an amenable number.

921466013 is a deficient number, since it is larger than the sum of its proper divisors (70882015).

921466013 is a wasteful number, since it uses less digits than its factorization.

921466013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70882014.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 921466013 is about 30355.6586652308. The cubic root of 921466013 is about 973.1051563580.

The spelling of 921466013 in words is "nine hundred twenty-one million, four hundred sixty-six thousand, thirteen".