1694514421 has 2 divisors, whose sum is σ = 1694514422. Its totient is φ = 1694514420.

The previous prime is 1694514401. The next prime is 1694514473. The reversal of 1694514421 is 1244154961.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 954130321 + 740384100 = 30889^2 + 27210^2 .

It is a cyclic number.

It is not a de Polignac number, because 1694514421 - 2¹⁵ = 1694481653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1694514401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 847257210 + 847257211.

It is an arithmetic number, because the mean of its divisors is an integer number (847257211).

Almost surely, 2^1694514421 is an apocalyptic number.

It is an amenable number.

1694514421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1694514421 is an equidigital number, since it uses as much as digits as its factorization.

1694514421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 37.

The square root of 1694514421 is about 41164.4800890282. The cubic root of 1694514421 is about 1192.1980937106.

The spelling of 1694514421 in words is "one billion, six hundred ninety-four million, five hundred fourteen thousand, four hundred twenty-one".