1319999131 has 4 divisors (see below), whose sum is σ = 1439999064. Its totient is φ = 1199999200.

The previous prime is 1319999113. The next prime is 1319999147.

1319999131 is nontrivially palindromic in base 10.

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

It is a cyclic number.

It is not a de Polignac number, because 1319999131 - 2¹³ = 1319990939 is a prime.

It is a super-2 number, since 2×1319999131² = 3484795411681510322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1319999101) 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, 59999950 + ... + 59999971.

It is an arithmetic number, because the mean of its divisors is an integer number (359999766).

Almost surely, 2^1319999131 is an apocalyptic number.

1319999131 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1319999131 is a deficient number, since it is larger than the sum of its proper divisors (119999933).

1319999131 is a wasteful number, since it uses less digits than its factorization.

1319999131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119999932.

The product of its digits is 59049, while the sum is 46.

The square root of 1319999131 is about 36331.7922899490. The cubic root of 1319999131 is about 1096.9610697644.

The spelling of 1319999131 in words is "one billion, three hundred nineteen million, nine hundred ninety-nine thousand, one hundred thirty-one".