906460921 has 4 divisors (see below), whose sum is σ = 907016292. Its totient is φ = 905905552.

The previous prime is 906460913. The next prime is 906460939. The reversal of 906460921 is 129064609.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 96432400 + 810028521 = 9820^2 + 28461^2 .

It is a cyclic number.

It is not a de Polignac number, because 906460921 - 2³ = 906460913 is a prime.

It is a super-3 number, since 3×906460921³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (906440921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 275230 + ... + 278503.

It is an arithmetic number, because the mean of its divisors is an integer number (226754073).

Almost surely, 2^906460921 is an apocalyptic number.

It is an amenable number.

906460921 is a deficient number, since it is larger than the sum of its proper divisors (555371).

906460921 is a wasteful number, since it uses less digits than its factorization.

906460921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555370.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 906460921 is about 30107.4894503012. The cubic root of 906460921 is about 967.7942301192.

The spelling of 906460921 in words is "nine hundred six million, four hundred sixty thousand, nine hundred twenty-one".