906720493 has 4 divisors (see below), whose sum is σ = 1036252000. Its totient is φ = 777188988.

The previous prime is 906720473. The next prime is 906720499. The reversal of 906720493 is 394027609.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 906720493 - 2¹⁷ = 906589421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (906720499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64765743 + ... + 64765756.

It is an arithmetic number, because the mean of its divisors is an integer number (259063000).

Almost surely, 2^906720493 is an apocalyptic number.

It is an amenable number.

906720493 is a deficient number, since it is larger than the sum of its proper divisors (129531507).

906720493 is a wasteful number, since it uses less digits than its factorization.

906720493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129531506.

The product of its (nonzero) digits is 81648, while the sum is 40.

The square root of 906720493 is about 30111.7998963861. The cubic root of 906720493 is about 967.8865997232.

The spelling of 906720493 in words is "nine hundred six million, seven hundred twenty thousand, four hundred ninety-three".