154948921 has 2 divisors, whose sum is σ = 154948922. Its totient is φ = 154948920.

The previous prime is 154948919. The next prime is 154948939. The reversal of 154948921 is 129849451.

154948921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120890025 + 34058896 = 10995^2 + 5836^2 .

It is a cyclic number.

It is not a de Polignac number, because 154948921 - 2¹ = 154948919 is a prime.

Together with 154948919, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (154948901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77474460 + 77474461.

It is an arithmetic number, because the mean of its divisors is an integer number (77474461).

Almost surely, 2^154948921 is an apocalyptic number.

It is an amenable number.

154948921 is a deficient number, since it is larger than the sum of its proper divisors (1).

154948921 is an equidigital number, since it uses as much as digits as its factorization.

154948921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 103680, while the sum is 43.

The square root of 154948921 is about 12447.8480469517. The cubic root of 154948921 is about 537.1095224920.

The spelling of 154948921 in words is "one hundred fifty-four million, nine hundred forty-eight thousand, nine hundred twenty-one".