154030991 has 2 divisors, whose sum is σ = 154030992. Its totient is φ = 154030990.

The previous prime is 154030939. The next prime is 154031027. The reversal of 154030991 is 199030451.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 154030991 - 2²⁶ = 86922127 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (154036991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77015495 + 77015496.

It is an arithmetic number, because the mean of its divisors is an integer number (77015496).

Almost surely, 2^154030991 is an apocalyptic number.

154030991 is a deficient number, since it is larger than the sum of its proper divisors (1).

154030991 is an equidigital number, since it uses as much as digits as its factorization.

154030991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 154030991 is about 12410.9222461508. The cubic root of 154030991 is about 536.0467943385.

The spelling of 154030991 in words is "one hundred fifty-four million, thirty thousand, nine hundred ninety-one".