148761971 has 2 divisors, whose sum is σ = 148761972. Its totient is φ = 148761970.

The previous prime is 148761947. The next prime is 148762021. The reversal of 148761971 is 179167841.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 148761971 - 2²⁶ = 81653107 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (148761911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74380985 + 74380986.

It is an arithmetic number, because the mean of its divisors is an integer number (74380986).

Almost surely, 2^148761971 is an apocalyptic number.

148761971 is a deficient number, since it is larger than the sum of its proper divisors (1).

148761971 is an equidigital number, since it uses as much as digits as its factorization.

148761971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84672, while the sum is 44.

The square root of 148761971 is about 12196.8016709300. The cubic root of 148761971 is about 529.8634642954.

The spelling of 148761971 in words is "one hundred forty-eight million, seven hundred sixty-one thousand, nine hundred seventy-one".