38547492421 has 2 divisors, whose sum is σ = 38547492422. Its totient is φ = 38547492420.

The previous prime is 38547492409. The next prime is 38547492437. The reversal of 38547492421 is 12429474583.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35308289025 + 3239203396 = 187905^2 + 56914^2 .

It is a cyclic number.

It is not a de Polignac number, because 38547492421 - 2²⁷ = 38413274693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38547492461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19273746210 + 19273746211.

It is an arithmetic number, because the mean of its divisors is an integer number (19273746211).

Almost surely, 2^38547492421 is an apocalyptic number.

It is an amenable number.

38547492421 is a deficient number, since it is larger than the sum of its proper divisors (1).

38547492421 is an equidigital number, since it uses as much as digits as its factorization.

38547492421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1935360, while the sum is 49.

The spelling of 38547492421 in words is "thirty-eight billion, five hundred forty-seven million, four hundred ninety-two thousand, four hundred twenty-one".