905677993 has 8 divisors (see below), whose sum is σ = 988598880. Its totient is φ = 822854880.

The previous prime is 905677979. The next prime is 905677999. The reversal of 905677993 is 399776509.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 905677993 - 2²¹ = 903580841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (905677999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4348 + ... + 42781.

It is an arithmetic number, because the mean of its divisors is an integer number (123574860).

Almost surely, 2^905677993 is an apocalyptic number.

It is an amenable number.

905677993 is a deficient number, since it is larger than the sum of its proper divisors (82920887).

905677993 is a wasteful number, since it uses less digits than its factorization.

905677993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48887.

The product of its (nonzero) digits is 3214890, while the sum is 55.

The square root of 905677993 is about 30094.4844282138. The cubic root of 905677993 is about 967.5155156011.

The spelling of 905677993 in words is "nine hundred five million, six hundred seventy-seven thousand, nine hundred ninety-three".