997023151 has 2 divisors, whose sum is σ = 997023152. Its totient is φ = 997023150.

The previous prime is 997023073. The next prime is 997023163. The reversal of 997023151 is 151320799.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 997023151 - 2¹⁹ = 996498863 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 997023151.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (997020151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498511575 + 498511576.

It is an arithmetic number, because the mean of its divisors is an integer number (498511576).

Almost surely, 2^997023151 is an apocalyptic number.

997023151 is a deficient number, since it is larger than the sum of its proper divisors (1).

997023151 is an equidigital number, since it uses as much as digits as its factorization.

997023151 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17010, while the sum is 37.

The square root of 997023151 is about 31575.6734053290. The cubic root of 997023151 is about 999.0067307428.

The spelling of 997023151 in words is "nine hundred ninety-seven million, twenty-three thousand, one hundred fifty-one".