148942993 has 2 divisors, whose sum is σ = 148942994. Its totient is φ = 148942992.

The previous prime is 148942991. The next prime is 148942999. The reversal of 148942993 is 399249841.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 115627009 + 33315984 = 10753^2 + 5772^2 .

It is a cyclic number.

It is not a de Polignac number, because 148942993 - 2¹ = 148942991 is a prime.

Together with 148942991, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (148942991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74471496 + 74471497.

It is an arithmetic number, because the mean of its divisors is an integer number (74471497).

Almost surely, 2^148942993 is an apocalyptic number.

It is an amenable number.

148942993 is a deficient number, since it is larger than the sum of its proper divisors (1).

148942993 is an equidigital number, since it uses as much as digits as its factorization.

148942993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 559872, while the sum is 49.

The square root of 148942993 is about 12204.2202946358. The cubic root of 148942993 is about 530.0782998119.

The spelling of 148942993 in words is "one hundred forty-eight million, nine hundred forty-two thousand, nine hundred ninety-three".