997962091 has 8 divisors (see below), whose sum is σ = 1147122144. Its totient is φ = 850450560.

The previous prime is 997962083. The next prime is 997962109. The reversal of 997962091 is 190269799.

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 997962091 - 2³ = 997962083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (997962191) 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, 410830 + ... + 413251.

It is an arithmetic number, because the mean of its divisors is an integer number (143390268).

Almost surely, 2^997962091 is an apocalyptic number.

997962091 is a deficient number, since it is larger than the sum of its proper divisors (149160053).

997962091 is a wasteful number, since it uses less digits than its factorization.

997962091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 824261.

The product of its (nonzero) digits is 551124, while the sum is 52.

The square root of 997962091 is about 31590.5379979512. The cubic root of 997962091 is about 999.3202350243.

The spelling of 997962091 in words is "nine hundred ninety-seven million, nine hundred sixty-two thousand, ninety-one".