148739993 has 2 divisors, whose sum is σ = 148739994. Its totient is φ = 148739992.

The previous prime is 148739957. The next prime is 148740001. The reversal of 148739993 is 399937841.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 139546969 + 9193024 = 11813^2 + 3032^2 .

It is a cyclic number.

It is not a de Polignac number, because 148739993 - 2²⁰ = 147691417 is a prime.

It is not a weakly prime, because it can be changed into another prime (148739893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74369996 + 74369997.

It is an arithmetic number, because the mean of its divisors is an integer number (74369997).

Almost surely, 2^148739993 is an apocalyptic number.

It is an amenable number.

148739993 is a deficient number, since it is larger than the sum of its proper divisors (1).

148739993 is an equidigital number, since it uses as much as digits as its factorization.

148739993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1469664, while the sum is 53.

The square root of 148739993 is about 12195.9006637476. The cubic root of 148739993 is about 529.8373691120.

The spelling of 148739993 in words is "one hundred forty-eight million, seven hundred thirty-nine thousand, nine hundred ninety-three".