7123256149 has 2 divisors, whose sum is σ = 7123256150. Its totient is φ = 7123256148.

The previous prime is 7123256113. The next prime is 7123256177. The reversal of 7123256149 is 9416523217.

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., 4616251249 + 2507004900 = 67943^2 + 50070^2 .

It is a cyclic number.

It is not a de Polignac number, because 7123256149 - 2¹¹ = 7123254101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7123253149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3561628074 + 3561628075.

It is an arithmetic number, because the mean of its divisors is an integer number (3561628075).

Almost surely, 2^7123256149 is an apocalyptic number.

It is an amenable number.

7123256149 is a deficient number, since it is larger than the sum of its proper divisors (1).

7123256149 is an equidigital number, since it uses as much as digits as its factorization.

7123256149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 40.

The square root of 7123256149 is about 84399.3847667150. The cubic root of 7123256149 is about 1924.0935654011.

The spelling of 7123256149 in words is "seven billion, one hundred twenty-three million, two hundred fifty-six thousand, one hundred forty-nine".