154011391 has 2 divisors, whose sum is σ = 154011392. Its totient is φ = 154011390.

The previous prime is 154011371. The next prime is 154011409. The reversal of 154011391 is 193110451.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-154011391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (154011311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77005695 + 77005696.

It is an arithmetic number, because the mean of its divisors is an integer number (77005696).

Almost surely, 2^154011391 is an apocalyptic number.

154011391 is a deficient number, since it is larger than the sum of its proper divisors (1).

154011391 is an equidigital number, since it uses as much as digits as its factorization.

154011391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 540, while the sum is 25.

The square root of 154011391 is about 12410.1325939734. The cubic root of 154011391 is about 536.0240565705.

The spelling of 154011391 in words is "one hundred fifty-four million, eleven thousand, three hundred ninety-one".