1399374077 has 4 divisors (see below), whose sum is σ = 1437195036. Its totient is φ = 1361553120.

The previous prime is 1399374043. The next prime is 1399374101. The reversal of 1399374077 is 7704739931.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 654029476 + 745344601 = 25574^2 + 27301^2 .

It is a cyclic number.

It is not a de Polignac number, because 1399374077 - 2¹² = 1399369981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1399374017) 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, 18910424 + ... + 18910497.

It is an arithmetic number, because the mean of its divisors is an integer number (359298759).

Almost surely, 2^1399374077 is an apocalyptic number.

It is an amenable number.

1399374077 is a deficient number, since it is larger than the sum of its proper divisors (37820959).

1399374077 is an equidigital number, since it uses as much as digits as its factorization.

1399374077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37820958.

The product of its (nonzero) digits is 1000188, while the sum is 50.

The square root of 1399374077 is about 37408.2086847259. The cubic root of 1399374077 is about 1118.5221998155.

The spelling of 1399374077 in words is "one billion, three hundred ninety-nine million, three hundred seventy-four thousand, seventy-seven".