149875993 has 2 divisors, whose sum is σ = 149875994. Its totient is φ = 149875992.

The previous prime is 149875967. The next prime is 149876003. The reversal of 149875993 is 399578941.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90478144 + 59397849 = 9512^2 + 7707^2 .

It is an emirp because it is prime and its reverse (399578941) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-149875993 is a prime.

It is not a weakly prime, because it can be changed into another prime (149879993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74937996 + 74937997.

It is an arithmetic number, because the mean of its divisors is an integer number (74937997).

Almost surely, 2^149875993 is an apocalyptic number.

It is an amenable number.

149875993 is a deficient number, since it is larger than the sum of its proper divisors (1).

149875993 is an equidigital number, since it uses as much as digits as its factorization.

149875993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2449440, while the sum is 55.

The square root of 149875993 is about 12242.3851025852. The cubic root of 149875993 is about 531.1828252226.

The spelling of 149875993 in words is "one hundred forty-nine million, eight hundred seventy-five thousand, nine hundred ninety-three".