1399732499 has 8 divisors (see below), whose sum is σ = 1529044992. Its totient is φ = 1270764040.

The previous prime is 1399732487. The next prime is 1399732541. The reversal of 1399732499 is 9942379931.

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

It is a cyclic number.

It is not a de Polignac number, because 1399732499 - 2¹² = 1399728403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1393732499) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77459 + ... + 93804.

It is an arithmetic number, because the mean of its divisors is an integer number (191130624).

Almost surely, 2^1399732499 is an apocalyptic number.

1399732499 is a deficient number, since it is larger than the sum of its proper divisors (129312493).

1399732499 is a wasteful number, since it uses less digits than its factorization.

1399732499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172017.

The product of its digits is 3306744, while the sum is 56.

The square root of 1399732499 is about 37412.9990644963. Note that the first 3 decimals coincide. The cubic root of 1399732499 is about 1118.6176874452.

The spelling of 1399732499 in words is "one billion, three hundred ninety-nine million, seven hundred thirty-two thousand, four hundred ninety-nine".