1399093249 has 4 divisors (see below), whose sum is σ = 1403650864. Its totient is φ = 1394535636.

The previous prime is 1399093237. The next prime is 1399093259. The reversal of 1399093249 is 9423909931.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9423909931 = 17 ⋅554347643.

It is a cyclic number.

It is not a de Polignac number, because 1399093249 - 2⁷ = 1399093121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1399093219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2278347 + ... + 2278960.

It is an arithmetic number, because the mean of its divisors is an integer number (350912716).

Almost surely, 2^1399093249 is an apocalyptic number.

It is an amenable number.

1399093249 is a deficient number, since it is larger than the sum of its proper divisors (4557615).

1399093249 is an equidigital number, since it uses as much as digits as its factorization.

1399093249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4557614.

The product of its (nonzero) digits is 472392, while the sum is 49.

The square root of 1399093249 is about 37404.4549352079. The cubic root of 1399093249 is about 1118.4473727024.

The spelling of 1399093249 in words is "one billion, three hundred ninety-nine million, ninety-three thousand, two hundred forty-nine".