54661421 has 2 divisors, whose sum is σ = 54661422. Its totient is φ = 54661420.

The previous prime is 54661357. The next prime is 54661489. The reversal of 54661421 is 12416645.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43705321 + 10956100 = 6611^2 + 3310^2 .

It is a cyclic number.

It is not a de Polignac number, because 54661421 - 2⁶ = 54661357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54661021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27330710 + 27330711.

It is an arithmetic number, because the mean of its divisors is an integer number (27330711).

Almost surely, 2^54661421 is an apocalyptic number.

It is an amenable number.

54661421 is a deficient number, since it is larger than the sum of its proper divisors (1).

54661421 is an equidigital number, since it uses as much as digits as its factorization.

54661421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5760, while the sum is 29.

The square root of 54661421 is about 7393.3362563866. The cubic root of 54661421 is about 379.5132757357.

The spelling of 54661421 in words is "fifty-four million, six hundred sixty-one thousand, four hundred twenty-one".