148809949 has 2 divisors, whose sum is σ = 148809950. Its totient is φ = 148809948.

The previous prime is 148809923. The next prime is 148809979. The reversal of 148809949 is 949908841.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 107785924 + 41024025 = 10382^2 + 6405^2 .

It is a cyclic number.

It is not a de Polignac number, because 148809949 - 2⁵ = 148809917 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 148809896 and 148809905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (148809979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74404974 + 74404975.

It is an arithmetic number, because the mean of its divisors is an integer number (74404975).

Almost surely, 2^148809949 is an apocalyptic number.

It is an amenable number.

148809949 is a deficient number, since it is larger than the sum of its proper divisors (1).

148809949 is an equidigital number, since it uses as much as digits as its factorization.

148809949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 746496, while the sum is 52.

The square root of 148809949 is about 12198.7683394677. The cubic root of 148809949 is about 529.9204211835.

The spelling of 148809949 in words is "one hundred forty-eight million, eight hundred nine thousand, nine hundred forty-nine".