149749597 has 2 divisors, whose sum is σ = 149749598. Its totient is φ = 149749596.

The previous prime is 149749577. The next prime is 149749643. The reversal of 149749597 is 795947941.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 132227001 + 17522596 = 11499^2 + 4186^2 .

It is a cyclic number.

It is not a de Polignac number, because 149749597 - 2¹⁵ = 149716829 is a prime.

It is a super-3 number, since 3×149749597³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149749517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74874798 + 74874799.

It is an arithmetic number, because the mean of its divisors is an integer number (74874799).

Almost surely, 2^149749597 is an apocalyptic number.

It is an amenable number.

149749597 is a deficient number, since it is larger than the sum of its proper divisors (1).

149749597 is an equidigital number, since it uses as much as digits as its factorization.

149749597 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2857680, while the sum is 55.

The square root of 149749597 is about 12237.2217843757. The cubic root of 149749597 is about 531.0334611481.

The spelling of 149749597 in words is "one hundred forty-nine million, seven hundred forty-nine thousand, five hundred ninety-seven".