1969397845 has 8 divisors (see below), whose sum is σ = 2365536600. Its totient is φ = 1574012160.

The previous prime is 1969397821. The next prime is 1969397867. The reversal of 1969397845 is 5487939691.

It can be written as a sum of positive squares in 4 ways, for example, as 313396209 + 1656001636 = 17703^2 + 40694^2 .

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

It is not a de Polignac number, because 1969397845 - 2¹⁷ = 1969266773 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 182496 + ... + 192985.

It is an arithmetic number, because the mean of its divisors is an integer number (295692075).

Almost surely, 2^1969397845 is an apocalyptic number.

It is an amenable number.

1969397845 is a deficient number, since it is larger than the sum of its proper divisors (396138755).

1969397845 is a wasteful number, since it uses less digits than its factorization.

1969397845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376535.

The product of its digits is 14696640, while the sum is 61.

The square root of 1969397845 is about 44377.8981588808. The cubic root of 1969397845 is about 1253.4619433736.

The spelling of 1969397845 in words is "one billion, nine hundred sixty-nine million, three hundred ninety-seven thousand, eight hundred forty-five".