1979526131 has 4 divisors (see below), whose sum is σ = 2159483064. Its totient is φ = 1799569200.

The previous prime is 1979526103. The next prime is 1979526139. The reversal of 1979526131 is 1316259791.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-1979526131 is a prime.

It is a super-2 number, since 2×1979526131² = 7837047406623658322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1979526139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89978450 + ... + 89978471.

It is an arithmetic number, because the mean of its divisors is an integer number (539870766).

Almost surely, 2^1979526131 is an apocalyptic number.

1979526131 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1979526131 is a deficient number, since it is larger than the sum of its proper divisors (179956933).

1979526131 is a wasteful number, since it uses less digits than its factorization.

1979526131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179956932.

The product of its digits is 102060, while the sum is 44.

The square root of 1979526131 is about 44491.8658970379. The cubic root of 1979526131 is about 1255.6070524438.

The spelling of 1979526131 in words is "one billion, nine hundred seventy-nine million, five hundred twenty-six thousand, one hundred thirty-one".