148580981 has 2 divisors, whose sum is σ = 148580982. Its totient is φ = 148580980.

The previous prime is 148580977. The next prime is 148580987. The reversal of 148580981 is 189085841.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 100500625 + 48080356 = 10025^2 + 6934^2 .

It is a cyclic number.

It is not a de Polignac number, because 148580981 - 2² = 148580977 is a prime.

It is a super-2 number, since 2×148580981² = 44152615829844722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (148580987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74290490 + 74290491.

It is an arithmetic number, because the mean of its divisors is an integer number (74290491).

Almost surely, 2^148580981 is an apocalyptic number.

It is an amenable number.

148580981 is a deficient number, since it is larger than the sum of its proper divisors (1).

148580981 is an equidigital number, since it uses as much as digits as its factorization.

148580981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 92160, while the sum is 44.

The square root of 148580981 is about 12189.3798447665. The cubic root of 148580981 is about 529.6484924492.

The spelling of 148580981 in words is "one hundred forty-eight million, five hundred eighty thousand, nine hundred eighty-one".