157444997 has 2 divisors, whose sum is σ = 157444998. Its totient is φ = 157444996.

The previous prime is 157444967. The next prime is 157445009. The reversal of 157444997 is 799444751.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 127260961 + 30184036 = 11281^2 + 5494^2 .

It is a cyclic number.

It is not a de Polignac number, because 157444997 - 2⁶ = 157444933 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157444907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78722498 + 78722499.

It is an arithmetic number, because the mean of its divisors is an integer number (78722499).

Almost surely, 2^157444997 is an apocalyptic number.

It is an amenable number.

157444997 is a deficient number, since it is larger than the sum of its proper divisors (1).

157444997 is an equidigital number, since it uses as much as digits as its factorization.

157444997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1270080, while the sum is 50.

The square root of 157444997 is about 12547.7088346837. The cubic root of 157444997 is about 539.9782764466.

The spelling of 157444997 in words is "one hundred fifty-seven million, four hundred forty-four thousand, nine hundred ninety-seven".