139464863 has 2 divisors, whose sum is σ = 139464864. Its totient is φ = 139464862.

The previous prime is 139464859. The next prime is 139464907. The reversal of 139464863 is 368464931.

It is an a-pointer prime, because the next prime (139464907) can be obtained adding 139464863 to its sum of digits (44).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 139464863 - 2² = 139464859 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139464823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69732431 + 69732432.

It is an arithmetic number, because the mean of its divisors is an integer number (69732432).

Almost surely, 2^139464863 is an apocalyptic number.

139464863 is a deficient number, since it is larger than the sum of its proper divisors (1).

139464863 is an equidigital number, since it uses as much as digits as its factorization.

139464863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 373248, while the sum is 44.

The square root of 139464863 is about 11809.5242495200. The cubic root of 139464863 is about 518.5869712115.

The spelling of 139464863 in words is "one hundred thirty-nine million, four hundred sixty-four thousand, eight hundred sixty-three".