1400019129 has 6 divisors (see below), whose sum is σ = 2022249866. Its totient is φ = 933346080.

The previous prime is 1400019091. The next prime is 1400019133. The reversal of 1400019129 is 9219100041.

It can be written as a sum of positive squares in only one way, i.e., 1092963600 + 307055529 = 33060^2 + 17523^2 .

It is not a de Polignac number, because 1400019129 - 2⁷ = 1400019001 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1400019329) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 77778832 + ... + 77778849.

Almost surely, 2^1400019129 is an apocalyptic number.

It is an amenable number.

1400019129 is a deficient number, since it is larger than the sum of its proper divisors (622230737).

1400019129 is a wasteful number, since it uses less digits than its factorization.

1400019129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155557687 (or 155557684 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 27.

The square root of 1400019129 is about 37416.8294888811. The cubic root of 1400019129 is about 1118.6940371536.

The spelling of 1400019129 in words is "one billion, four hundred million, nineteen thousand, one hundred twenty-nine".