148977471949 has 2 divisors, whose sum is σ = 148977471950. Its totient is φ = 148977471948.

The previous prime is 148977471943. The next prime is 148977471971. The reversal of 148977471949 is 949174779841.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 141759780100 + 7217691849 = 376510^2 + 84957^2 .

It is a cyclic number.

It is not a de Polignac number, because 148977471949 - 2²⁵ = 148943917517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (148977471943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74488735974 + 74488735975.

It is an arithmetic number, because the mean of its divisors is an integer number (74488735975).

Almost surely, 2^148977471949 is an apocalyptic number.

It is an amenable number.

148977471949 is a deficient number, since it is larger than the sum of its proper divisors (1).

148977471949 is an equidigital number, since it uses as much as digits as its factorization.

148977471949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 128024064, while the sum is 70.

The spelling of 148977471949 in words is "one hundred forty-eight billion, nine hundred seventy-seven million, four hundred seventy-one thousand, nine hundred forty-nine".