1919435997 has 8 divisors (see below), whose sum is σ = 2670519744. Its totient is φ = 1223988128.

The previous prime is 1919435981. The next prime is 1919436011. The reversal of 1919435997 is 7995349191.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1919435997 - 2⁴ = 1919435981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1919475997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13908888 + ... + 13909025.

It is an arithmetic number, because the mean of its divisors is an integer number (333814968).

Almost surely, 2^1919435997 is an apocalyptic number.

It is an amenable number.

1919435997 is a deficient number, since it is larger than the sum of its proper divisors (751083747).

1919435997 is a wasteful number, since it uses less digits than its factorization.

1919435997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27817939.

The product of its digits is 2755620, while the sum is 57.

The square root of 1919435997 is about 43811.3683534308. The cubic root of 1919435997 is about 1242.7712898759.

The spelling of 1919435997 in words is "one billion, nine hundred nineteen million, four hundred thirty-five thousand, nine hundred ninety-seven".