1399497061 has 4 divisors (see below), whose sum is σ = 1399636800. Its totient is φ = 1399357324.

The previous prime is 1399497053. The next prime is 1399497067. The reversal of 1399497061 is 1607949931.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1399497061 - 2³ = 1399497053 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1399496996 and 1399497014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1399497067) 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, 53581 + ... + 75298.

It is an arithmetic number, because the mean of its divisors is an integer number (349909200).

Almost surely, 2^1399497061 is an apocalyptic number.

It is an amenable number.

1399497061 is a deficient number, since it is larger than the sum of its proper divisors (139739).

1399497061 is a wasteful number, since it uses less digits than its factorization.

1399497061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139738.

The product of its (nonzero) digits is 367416, while the sum is 49.

The square root of 1399497061 is about 37409.8524589446. The cubic root of 1399497061 is about 1118.5549659659.

The spelling of 1399497061 in words is "one billion, three hundred ninety-nine million, four hundred ninety-seven thousand, sixty-one".