2537688421 has 2 divisors, whose sum is σ = 2537688422. Its totient is φ = 2537688420.

The previous prime is 2537688409. The next prime is 2537688493. The reversal of 2537688421 is 1248867352.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2445797025 + 91891396 = 49455^2 + 9586^2 .

It is a cyclic number.

It is not a de Polignac number, because 2537688421 - 2¹⁷ = 2537557349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2537688721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1268844210 + 1268844211.

It is an arithmetic number, because the mean of its divisors is an integer number (1268844211).

Almost surely, 2^2537688421 is an apocalyptic number.

It is an amenable number.

2537688421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2537688421 is an equidigital number, since it uses as much as digits as its factorization.

2537688421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 645120, while the sum is 46.

The square root of 2537688421 is about 50375.4743997513. The cubic root of 2537688421 is about 1363.9949613609.

The spelling of 2537688421 in words is "two billion, five hundred thirty-seven million, six hundred eighty-eight thousand, four hundred twenty-one".