2693172421 has 2 divisors, whose sum is σ = 2693172422. Its totient is φ = 2693172420.

The previous prime is 2693172409. The next prime is 2693172439. The reversal of 2693172421 is 1242713962.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2643399396 + 49773025 = 51414^2 + 7055^2 .

It is a cyclic number.

It is not a de Polignac number, because 2693172421 - 2¹¹ = 2693170373 is a prime.

It is a super-5 number, since 5×2693172421⁵ (a number of 48 digits) contains 55555 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2693172481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1346586210 + 1346586211.

It is an arithmetic number, because the mean of its divisors is an integer number (1346586211).

Almost surely, 2^2693172421 is an apocalyptic number.

It is an amenable number.

2693172421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2693172421 is an equidigital number, since it uses as much as digits as its factorization.

2693172421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 37.

The square root of 2693172421 is about 51895.7842314768. The cubic root of 2693172421 is about 1391.3019254700.

The spelling of 2693172421 in words is "two billion, six hundred ninety-three million, one hundred seventy-two thousand, four hundred twenty-one".