997350157 has 2 divisors, whose sum is σ = 997350158. Its totient is φ = 997350156.

The previous prime is 997350143. The next prime is 997350191. The reversal of 997350157 is 751053799.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 860483556 + 136866601 = 29334^2 + 11699^2 .

It is a cyclic number.

It is not a de Polignac number, because 997350157 - 2²³ = 988961549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (997360157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498675078 + 498675079.

It is an arithmetic number, because the mean of its divisors is an integer number (498675079).

Almost surely, 2^997350157 is an apocalyptic number.

It is an amenable number.

997350157 is a deficient number, since it is larger than the sum of its proper divisors (1).

997350157 is an equidigital number, since it uses as much as digits as its factorization.

997350157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 297675, while the sum is 46.

The square root of 997350157 is about 31580.8511126600. The cubic root of 997350157 is about 999.1159376641.

The spelling of 997350157 in words is "nine hundred ninety-seven million, three hundred fifty thousand, one hundred fifty-seven".