1293689031 has 32 divisors (see below), whose sum is σ = 1811496960. Its totient is φ = 820435200.

The previous prime is 1293689029. The next prime is 1293689039. The reversal of 1293689031 is 1309863921.

It is not a de Polignac number, because 1293689031 - 2¹ = 1293689029 is a prime.

It is a super-2 number, since 2×1293689031² = 3347262617859437922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1293689039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1244610 + ... + 1245648.

It is an arithmetic number, because the mean of its divisors is an integer number (56609280).

Almost surely, 2^1293689031 is an apocalyptic number.

1293689031 is a deficient number, since it is larger than the sum of its proper divisors (517807929).

1293689031 is a wasteful number, since it uses less digits than its factorization.

1293689031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1327.

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 1293689031 is about 35967.8888871727. Note that the first 5 decimals coincide. The cubic root of 1293689031 is about 1089.6239285632.

The spelling of 1293689031 in words is "one billion, two hundred ninety-three million, six hundred eighty-nine thousand, thirty-one".