149078023 has 2 divisors, whose sum is σ = 149078024. Its totient is φ = 149078022.

The previous prime is 149077997. The next prime is 149078077. The reversal of 149078023 is 320870941.

It is a weak prime.

It is an emirp because it is prime and its reverse (320870941) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-149078023 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 149078023.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149078093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74539011 + 74539012.

It is an arithmetic number, because the mean of its divisors is an integer number (74539012).

Almost surely, 2^149078023 is an apocalyptic number.

149078023 is a deficient number, since it is larger than the sum of its proper divisors (1).

149078023 is an equidigital number, since it uses as much as digits as its factorization.

149078023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 149078023 is about 12209.7511440651. The cubic root of 149078023 is about 530.2384390529.

The spelling of 149078023 in words is "one hundred forty-nine million, seventy-eight thousand, twenty-three".