154653991 has 2 divisors, whose sum is σ = 154653992. Its totient is φ = 154653990.

The previous prime is 154653937. The next prime is 154653997. The reversal of 154653991 is 199356451.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 154653991 - 2⁹ = 154653479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (154653997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77326995 + 77326996.

It is an arithmetic number, because the mean of its divisors is an integer number (77326996).

Almost surely, 2^154653991 is an apocalyptic number.

154653991 is a deficient number, since it is larger than the sum of its proper divisors (1).

154653991 is an equidigital number, since it uses as much as digits as its factorization.

154653991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145800, while the sum is 43.

The square root of 154653991 is about 12435.9957783846. The cubic root of 154653991 is about 536.7685277035.

The spelling of 154653991 in words is "one hundred fifty-four million, six hundred fifty-three thousand, nine hundred ninety-one".