54642391 has 2 divisors, whose sum is σ = 54642392. Its totient is φ = 54642390.

The previous prime is 54642383. The next prime is 54642431. The reversal of 54642391 is 19324645.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 54642391 - 2³ = 54642383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54612391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27321195 + 27321196.

It is an arithmetic number, because the mean of its divisors is an integer number (27321196).

Almost surely, 2^54642391 is an apocalyptic number.

54642391 is a deficient number, since it is larger than the sum of its proper divisors (1).

54642391 is an equidigital number, since it uses as much as digits as its factorization.

54642391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 34.

The square root of 54642391 is about 7392.0491746200. The cubic root of 54642391 is about 379.4692289731.

The spelling of 54642391 in words is "fifty-four million, six hundred forty-two thousand, three hundred ninety-one".