139463297 has 4 divisors (see below), whose sum is σ = 139571796. Its totient is φ = 139354800.

The previous prime is 139463251. The next prime is 139463347. The reversal of 139463297 is 792364931.

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 128881 + 139334416 = 359^2 + 11804^2 .

It is a cyclic number.

It is not a de Polignac number, because 139463297 - 2²² = 135268993 is a prime.

It is a super-2 number, since 2×139463297² = 38900022420220418, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139463227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52298 + ... + 54899.

It is an arithmetic number, because the mean of its divisors is an integer number (34892949).

Almost surely, 2^139463297 is an apocalyptic number.

It is an amenable number.

139463297 is a deficient number, since it is larger than the sum of its proper divisors (108499).

139463297 is a wasteful number, since it uses less digits than its factorization.

139463297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108498.

The product of its digits is 244944, while the sum is 44.

The square root of 139463297 is about 11809.4579469170. The cubic root of 139463297 is about 518.5850301963.

The spelling of 139463297 in words is "one hundred thirty-nine million, four hundred sixty-three thousand, two hundred ninety-seven".