1390091249 has 8 divisors (see below), whose sum is σ = 1451468160. Its totient is φ = 1329610576.

The previous prime is 1390091233. The next prime is 1390091293. The reversal of 1390091249 is 9421900931.

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 1390091249 - 2⁴ = 1390091233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1390091149) 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, 220889 + ... + 227094.

It is an arithmetic number, because the mean of its divisors is an integer number (181433520).

Almost surely, 2^1390091249 is an apocalyptic number.

It is an amenable number.

1390091249 is a deficient number, since it is larger than the sum of its proper divisors (61376911).

1390091249 is a wasteful number, since it uses less digits than its factorization.

1390091249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448119.

The product of its (nonzero) digits is 17496, while the sum is 38.

The square root of 1390091249 is about 37283.9274889328. The cubic root of 1390091249 is about 1116.0434503987.

The spelling of 1390091249 in words is "one billion, three hundred ninety million, ninety-one thousand, two hundred forty-nine".