1980902679 has 32 divisors (see below), whose sum is σ = 3199021056. Its totient is φ = 1064378880.

The previous prime is 1980902657. The next prime is 1980902683. The reversal of 1980902679 is 9762090891.

It is a happy number.

It is not a de Polignac number, because 1980902679 - 2⁸ = 1980902423 is a prime.

It is a super-3 number, since 3×1980902679³ (a number of 29 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1980902579) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 557649 + ... + 561189.

It is an arithmetic number, because the mean of its divisors is an integer number (99969408).

Almost surely, 2^1980902679 is an apocalyptic number.

1980902679 is a deficient number, since it is larger than the sum of its proper divisors (1218118377).

1980902679 is a wasteful number, since it uses less digits than its factorization.

1980902679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5135.

The product of its (nonzero) digits is 489888, while the sum is 51.

The square root of 1980902679 is about 44507.3328677421. The cubic root of 1980902679 is about 1255.8980316610.

The spelling of 1980902679 in words is "one billion, nine hundred eighty million, nine hundred two thousand, six hundred seventy-nine".