3457761821 has 2 divisors, whose sum is σ = 3457761822. Its totient is φ = 3457761820.

The previous prime is 3457761803. The next prime is 3457761907. The reversal of 3457761821 is 1281677543.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2328062500 + 1129699321 = 48250^2 + 33611^2 .

It is an emirp because it is prime and its reverse (1281677543) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3457761821 - 2¹⁴ = 3457745437 is a prime.

It is a super-2 number, since 2×3457761821² = 23912233621530472082, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3457761521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1728880910 + 1728880911.

It is an arithmetic number, because the mean of its divisors is an integer number (1728880911).

Almost surely, 2^3457761821 is an apocalyptic number.

It is an amenable number.

3457761821 is a deficient number, since it is larger than the sum of its proper divisors (1).

3457761821 is an equidigital number, since it uses as much as digits as its factorization.

3457761821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 282240, while the sum is 44.

The square root of 3457761821 is about 58802.7365094517. The cubic root of 3457761821 is about 1512.1621323589.

The spelling of 3457761821 in words is "three billion, four hundred fifty-seven million, seven hundred sixty-one thousand, eight hundred twenty-one".