1269999983 has 6 divisors (see below), whose sum is σ = 1477346976. Its totient is φ = 1088571372.

The previous prime is 1269999959. The next prime is 1270000021. The reversal of 1269999983 is 3899999621.

It is not a de Polignac number, because 1269999983 - 2¹⁴ = 1269983599 is a prime.

It is a super-2 number, since 2×1269999983² = 3225799913640000578, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1269999923) 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, 12959135 + ... + 12959232.

It is an arithmetic number, because the mean of its divisors is an integer number (246224496).

Almost surely, 2^1269999983 is an apocalyptic number.

1269999983 is a deficient number, since it is larger than the sum of its proper divisors (207346993).

1269999983 is an equidigital number, since it uses as much as digits as its factorization.

1269999983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25918381 (or 25918374 counting only the distinct ones).

The product of its digits is 17006112, while the sum is 65.

The square root of 1269999983 is about 35637.0591238952. The cubic root of 1269999983 is about 1082.9321280000.

The spelling of 1269999983 in words is "one billion, two hundred sixty-nine million, nine hundred ninety-nine thousand, nine hundred eighty-three".