1351979900 has 18 divisors (see below), whose sum is σ = 2933796600. Its totient is φ = 540791920.

The previous prime is 1351979887. The next prime is 1351979917. The reversal of 1351979900 is 99791531.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6759800 + ... + 6759999.

It is an arithmetic number, because the mean of its divisors is an integer number (162988700).

Almost surely, 2^1351979900 is an apocalyptic number.

1351979900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1351979900 is an abundant number, since it is smaller than the sum of its proper divisors (1581816700).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1351979900 is a wasteful number, since it uses less digits than its factorization.

1351979900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13519813 (or 13519806 counting only the distinct ones).

The product of its (nonzero) digits is 76545, while the sum is 44.

The square root of 1351979900 is about 36769.2792967173. The cubic root of 1351979900 is about 1105.7494830058.

The spelling of 1351979900 in words is "one billion, three hundred fifty-one million, nine hundred seventy-nine thousand, nine hundred".