1399249037 has 2 divisors, whose sum is σ = 1399249038. Its totient is φ = 1399249036.

The previous prime is 1399249031. The next prime is 1399249063. The reversal of 1399249037 is 7309429931.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1396217956 + 3031081 = 37366^2 + 1741^2 .

It is a cyclic number.

It is not a de Polignac number, because 1399249037 - 2¹⁶ = 1399183501 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1399248982 and 1399249000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1399249031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 699624518 + 699624519.

It is an arithmetic number, because the mean of its divisors is an integer number (699624519).

Almost surely, 2^1399249037 is an apocalyptic number.

It is an amenable number.

1399249037 is a deficient number, since it is larger than the sum of its proper divisors (1).

1399249037 is an equidigital number, since it uses as much as digits as its factorization.

1399249037 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 367416, while the sum is 47.

The square root of 1399249037 is about 37406.5373564568. The cubic root of 1399249037 is about 1118.4888839247.

The spelling of 1399249037 in words is "one billion, three hundred ninety-nine million, two hundred forty-nine thousand, thirty-seven".