148557709 has 2 divisors, whose sum is σ = 148557710. Its totient is φ = 148557708.

The previous prime is 148557601. The next prime is 148557757. The reversal of 148557709 is 907755841.

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., 77492809 + 71064900 = 8803^2 + 8430^2 .

It is a cyclic number.

It is not a de Polignac number, because 148557709 - 2¹⁵ = 148524941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (148552709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74278854 + 74278855.

It is an arithmetic number, because the mean of its divisors is an integer number (74278855).

Almost surely, 2^148557709 is an apocalyptic number.

It is an amenable number.

148557709 is a deficient number, since it is larger than the sum of its proper divisors (1).

148557709 is an equidigital number, since it uses as much as digits as its factorization.

148557709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 352800, while the sum is 46.

The square root of 148557709 is about 12188.4252059074. The cubic root of 148557709 is about 529.6208383416.

The spelling of 148557709 in words is "one hundred forty-eight million, five hundred fifty-seven thousand, seven hundred nine".