1391544429 has 16 divisors (see below), whose sum is σ = 2038632960. Its totient is φ = 837290160.

The previous prime is 1391544421. The next prime is 1391544431. The reversal of 1391544429 is 9244451931.

It is not a de Polignac number, because 1391544429 - 2³ = 1391544421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1391544421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 147097 + ... + 156270.

It is an arithmetic number, because the mean of its divisors is an integer number (127414560).

Almost surely, 2^1391544429 is an apocalyptic number.

It is an amenable number.

1391544429 is a deficient number, since it is larger than the sum of its proper divisors (647088531).

1391544429 is a wasteful number, since it uses less digits than its factorization.

1391544429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303520.

The product of its digits is 155520, while the sum is 42.

The square root of 1391544429 is about 37303.4104204964. The cubic root of 1391544429 is about 1116.4322131774.

The spelling of 1391544429 in words is "one billion, three hundred ninety-one million, five hundred forty-four thousand, four hundred twenty-nine".