997901 has 8 divisors (see below), whose sum is σ = 1066560. Its totient is φ = 931392.

The previous prime is 997897. The next prime is 997933. The reversal of 997901 is 109799.

997901 = T₂₈₃ + T₂₈₄ + ... + T₃₀₅.

It is a happy number.

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 997901 - 2² = 997897 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 (997961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 485 + ... + 1493.

It is an arithmetic number, because the mean of its divisors is an integer number (133320).

2⁹⁹⁷⁹⁰¹ is an apocalyptic number.

It is an amenable number.

997901 is a deficient number, since it is larger than the sum of its proper divisors (68659).

997901 is a wasteful number, since it uses less digits than its factorization.

997901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1075.

The product of its (nonzero) digits is 5103, while the sum is 35.

The square root of 997901 is about 998.9499486961. The cubic root of 997901 is about 99.9299843228.

It can be divided in two parts, 99 and 7901, that added together give a cube (8000 = 20³).

The spelling of 997901 in words is "nine hundred ninety-seven thousand, nine hundred one".