537387421 has 2 divisors, whose sum is σ = 537387422. Its totient is φ = 537387420.

The previous prime is 537387397. The next prime is 537387443. The reversal of 537387421 is 124783735.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 501267321 + 36120100 = 22389^2 + 6010^2 .

It is a cyclic number.

It is not a de Polignac number, because 537387421 - 2¹³ = 537379229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (537357421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 268693710 + 268693711.

It is an arithmetic number, because the mean of its divisors is an integer number (268693711).

Almost surely, 2^537387421 is an apocalyptic number.

It is an amenable number.

537387421 is a deficient number, since it is larger than the sum of its proper divisors (1).

537387421 is an equidigital number, since it uses as much as digits as its factorization.

537387421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 141120, while the sum is 40.

The square root of 537387421 is about 23181.6181704384. The cubic root of 537387421 is about 813.0098964607.

The spelling of 537387421 in words is "five hundred thirty-seven million, three hundred eighty-seven thousand, four hundred twenty-one".