920912837491 has 16 divisors (see below), whose sum is σ = 930910757920. Its totient is φ = 910975403520.

The previous prime is 920912837483. The next prime is 920912837503. The reversal of 920912837491 is 194738219029.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 920912837491 - 2³ = 920912837483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (920912837591) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36547525 + ... + 36572713.

It is an arithmetic number, because the mean of its divisors is an integer number (58181922370).

Almost surely, 2^920912837491 is an apocalyptic number.

920912837491 is a deficient number, since it is larger than the sum of its proper divisors (9997920429).

920912837491 is a wasteful number, since it uses less digits than its factorization.

920912837491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26374.

The product of its (nonzero) digits is 1959552, while the sum is 55.

The spelling of 920912837491 in words is "nine hundred twenty billion, nine hundred twelve million, eight hundred thirty-seven thousand, four hundred ninety-one".