1399249007 has 4 divisors (see below), whose sum is σ = 1506883560. Its totient is φ = 1291614456.

The previous prime is 1399248989. The next prime is 1399249013. The reversal of 1399249007 is 7009429931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7009429931 = 7 ⋅1001347133.

It is a cyclic number.

It is not a de Polignac number, because 1399249007 - 2⁸ = 1399248751 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1399249037) 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, 53817257 + ... + 53817282.

It is an arithmetic number, because the mean of its divisors is an integer number (376720890).

Almost surely, 2^1399249007 is an apocalyptic number.

1399249007 is a deficient number, since it is larger than the sum of its proper divisors (107634553).

1399249007 is a wasteful number, since it uses less digits than its factorization.

1399249007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107634552.

The product of its (nonzero) digits is 122472, while the sum is 44.

The square root of 1399249007 is about 37406.5369554574. The cubic root of 1399249007 is about 1118.4888759312.

The spelling of 1399249007 in words is "one billion, three hundred ninety-nine million, two hundred forty-nine thousand, seven".