991352797 has 8 divisors (see below), whose sum is σ = 1049934560. Its totient is φ = 933411600.

The previous prime is 991352783. The next prime is 991352819. The reversal of 991352797 is 797253199.

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 991352797 - 2⁷ = 991352669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (991352767) 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, 156954 + ... + 163147.

It is an arithmetic number, because the mean of its divisors is an integer number (131241820).

Almost surely, 2^991352797 is an apocalyptic number.

It is an amenable number.

991352797 is a deficient number, since it is larger than the sum of its proper divisors (58581763).

991352797 is a wasteful number, since it uses less digits than its factorization.

991352797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320283.

The product of its digits is 1071630, while the sum is 52.

The square root of 991352797 is about 31485.7554617957. The cubic root of 991352797 is about 997.1092506201.

The spelling of 991352797 in words is "nine hundred ninety-one million, three hundred fifty-two thousand, seven hundred ninety-seven".