297145906 has 4 divisors (see below), whose sum is σ = 445718862. Its totient is φ = 148572952.

The previous prime is 297145897. The next prime is 297145913. The reversal of 297145906 is 609541792.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 291897225 + 5248681 = 17085^2 + 2291^2 .

It is an unprimeable number.

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, 74286475 + ... + 74286478.

Almost surely, 2^297145906 is an apocalyptic number.

297145906 is a deficient number, since it is larger than the sum of its proper divisors (148572956).

297145906 is a wasteful number, since it uses less digits than its factorization.

297145906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148572955.

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 297145906 is about 17237.9205822512. The cubic root of 297145906 is about 667.3032658631.

The spelling of 297145906 in words is "two hundred ninety-seven million, one hundred forty-five thousand, nine hundred six".