149644997 has 2 divisors, whose sum is σ = 149644998. Its totient is φ = 149644996.

The previous prime is 149644991. The next prime is 149645009. The reversal of 149644997 is 799446941.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 124233316 + 25411681 = 11146^2 + 5041^2 .

It is a cyclic number.

It is not a de Polignac number, because 149644997 - 2¹² = 149640901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149644991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74822498 + 74822499.

It is an arithmetic number, because the mean of its divisors is an integer number (74822499).

Almost surely, 2^149644997 is an apocalyptic number.

It is an amenable number.

149644997 is a deficient number, since it is larger than the sum of its proper divisors (1).

149644997 is an equidigital number, since it uses as much as digits as its factorization.

149644997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1959552, while the sum is 53.

The square root of 149644997 is about 12232.9471919076. The cubic root of 149644997 is about 530.9097901686.

The spelling of 149644997 in words is "one hundred forty-nine million, six hundred forty-four thousand, nine hundred ninety-seven".