1969790977 has 16 divisors (see below), whose sum is σ = 2486937600. Its totient is φ = 1515468240.

The previous prime is 1969790959. The next prime is 1969791007. The reversal of 1969790977 is 7790979691.

It is a de Polignac number, because none of the positive numbers 2^k-1969790977 is a prime.

It is a super-2 number, since 2×1969790977² = 7760152986141229058, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1969790947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 155827 + ... + 167992.

It is an arithmetic number, because the mean of its divisors is an integer number (155433600).

Almost surely, 2^1969790977 is an apocalyptic number.

It is an amenable number.

1969790977 is a deficient number, since it is larger than the sum of its proper divisors (517146623).

1969790977 is a wasteful number, since it uses less digits than its factorization.

1969790977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323916.

The product of its (nonzero) digits is 13502538, while the sum is 64.

The square root of 1969790977 is about 44382.3273049082. The cubic root of 1969790977 is about 1253.5453433523.

The spelling of 1969790977 in words is "one billion, nine hundred sixty-nine million, seven hundred ninety thousand, nine hundred seventy-seven".