1693907939 has 2 divisors, whose sum is σ = 1693907940. Its totient is φ = 1693907938.

The previous prime is 1693907927. The next prime is 1693907947. The reversal of 1693907939 is 9397093961.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1693907939 - 2²⁸ = 1425472483 is a prime.

It is not a weakly prime, because it can be changed into another prime (1693907909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 846953969 + 846953970.

It is an arithmetic number, because the mean of its divisors is an integer number (846953970).

Almost surely, 2^1693907939 is an apocalyptic number.

1693907939 is a deficient number, since it is larger than the sum of its proper divisors (1).

1693907939 is an equidigital number, since it uses as much as digits as its factorization.

1693907939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2480058, while the sum is 56.

The square root of 1693907939 is about 41157.1128603550. The cubic root of 1693907939 is about 1192.0558439203.

The spelling of 1693907939 in words is "one billion, six hundred ninety-three million, nine hundred seven thousand, nine hundred thirty-nine".