149536993 has 2 divisors, whose sum is σ = 149536994. Its totient is φ = 149536992.

The previous prime is 149536949. The next prime is 149537027. The reversal of 149536993 is 399635941.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82755409 + 66781584 = 9097^2 + 8172^2 .

It is an emirp because it is prime and its reverse (399635941) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 149536993 - 2⁹ = 149536481 is a prime.

It is a super-2 number, since 2×149536993² = 44722624550964098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (149576993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74768496 + 74768497.

It is an arithmetic number, because the mean of its divisors is an integer number (74768497).

Almost surely, 2^149536993 is an apocalyptic number.

It is an amenable number.

149536993 is a deficient number, since it is larger than the sum of its proper divisors (1).

149536993 is an equidigital number, since it uses as much as digits as its factorization.

149536993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 787320, while the sum is 49.

The square root of 149536993 is about 12228.5319233341. The cubic root of 149536993 is about 530.7820340736.

The spelling of 149536993 in words is "one hundred forty-nine million, five hundred thirty-six thousand, nine hundred ninety-three".