1399269649 has 8 divisors (see below), whose sum is σ = 1476000000. Its totient is φ = 1322847792.

The previous prime is 1399269637. The next prime is 1399269673. The reversal of 1399269649 is 9469629931.

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

It is a de Polignac number, because none of the positive numbers 2^k-1399269649 is a prime.

It is a super-2 number, since 2×1399269649² = 3915911101225166402, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1399269593 and 1399269602.

It is not an unprimeable number, because it can be changed into a prime (1399269679) 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, 67774 + ... + 85975.

It is an arithmetic number, because the mean of its divisors is an integer number (184500000).

Almost surely, 2^1399269649 is an apocalyptic number.

1399269649 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1399269649 is a deficient number, since it is larger than the sum of its proper divisors (76730351).

1399269649 is a wasteful number, since it uses less digits than its factorization.

1399269649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154247.

The product of its digits is 5668704, while the sum is 58.

The square root of 1399269649 is about 37406.8128687810. The cubic root of 1399269649 is about 1118.4943759610.

The spelling of 1399269649 in words is "one billion, three hundred ninety-nine million, two hundred sixty-nine thousand, six hundred forty-nine".