154036991 has 2 divisors, whose sum is σ = 154036992. Its totient is φ = 154036990.

The previous prime is 154036931. The next prime is 154036997. The reversal of 154036991 is 199630451.

It is a strong prime.

It is an emirp because it is prime and its reverse (199630451) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-154036991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (154036997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77018495 + 77018496.

It is an arithmetic number, because the mean of its divisors is an integer number (77018496).

Almost surely, 2^154036991 is an apocalyptic number.

154036991 is a deficient number, since it is larger than the sum of its proper divisors (1).

154036991 is an equidigital number, since it uses as much as digits as its factorization.

154036991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29160, while the sum is 38.

The square root of 154036991 is about 12411.1639663651. The cubic root of 154036991 is about 536.0537544942.

The spelling of 154036991 in words is "one hundred fifty-four million, thirty-six thousand, nine hundred ninety-one".