1299400431 has 8 divisors (see below), whose sum is σ = 1980038784. Its totient is φ = 742514520.

The previous prime is 1299400381. The next prime is 1299400463. The reversal of 1299400431 is 1340049921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1299400431 - 2²⁹ = 762529519 is a prime.

It is a super-2 number, since 2×1299400431² = 3376882960165971522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1299400392 and 1299400401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1299400471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30938085 + ... + 30938126.

It is an arithmetic number, because the mean of its divisors is an integer number (247504848).

Almost surely, 2^1299400431 is an apocalyptic number.

1299400431 is a deficient number, since it is larger than the sum of its proper divisors (680638353).

1299400431 is an equidigital number, since it uses as much as digits as its factorization.

1299400431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61876221.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 1299400431 is about 36047.1972696907. The cubic root of 1299400431 is about 1091.2250712753.

The spelling of 1299400431 in words is "one billion, two hundred ninety-nine million, four hundred thousand, four hundred thirty-one".