149212123 has 2 divisors, whose sum is σ = 149212124. Its totient is φ = 149212122.

The previous prime is 149212103. The next prime is 149212139. The reversal of 149212123 is 321212941.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 149212123 - 2⁹ = 149211611 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (149212103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74606061 + 74606062.

It is an arithmetic number, because the mean of its divisors is an integer number (74606062).

Almost surely, 2^149212123 is an apocalyptic number.

149212123 is a deficient number, since it is larger than the sum of its proper divisors (1).

149212123 is an equidigital number, since it uses as much as digits as its factorization.

149212123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 25.

The square root of 149212123 is about 12215.2414220923. The cubic root of 149212123 is about 530.3973796836.

The spelling of 149212123 in words is "one hundred forty-nine million, two hundred twelve thousand, one hundred twenty-three".