919769693 has 4 divisors (see below), whose sum is σ = 919837500. Its totient is φ = 919701888.

The previous prime is 919769681. The next prime is 919769737. The reversal of 919769693 is 396967919.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 674596729 + 245172964 = 25973^2 + 15658^2 .

It is a cyclic number.

It is not a de Polignac number, because 919769693 - 2⁴ = 919769677 is a prime.

It is a super-2 number, since 2×919769693² = 1691952576322628498, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (919769603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5780 + ... + 43277.

It is an arithmetic number, because the mean of its divisors is an integer number (229959375).

Almost surely, 2^919769693 is an apocalyptic number.

It is an amenable number.

919769693 is a deficient number, since it is larger than the sum of its proper divisors (67807).

919769693 is a wasteful number, since it uses less digits than its factorization.

919769693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67806.

The product of its digits is 4960116, while the sum is 59.

The square root of 919769693 is about 30327.7050401114. The cubic root of 919769693 is about 972.5076621940.

The spelling of 919769693 in words is "nine hundred nineteen million, seven hundred sixty-nine thousand, six hundred ninety-three".