139263641 has 4 divisors (see below), whose sum is σ = 151923984. Its totient is φ = 126603300.

The previous prime is 139263637. The next prime is 139263647. The reversal of 139263641 is 146362931.

It is a happy number.

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 139263641 - 2² = 139263637 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139263647) 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, 6330155 + ... + 6330176.

It is an arithmetic number, because the mean of its divisors is an integer number (37980996).

Almost surely, 2^139263641 is an apocalyptic number.

139263641 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

139263641 is a deficient number, since it is larger than the sum of its proper divisors (12660343).

139263641 is a wasteful number, since it uses less digits than its factorization.

139263641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12660342.

The product of its digits is 23328, while the sum is 35.

The square root of 139263641 is about 11801.0016947715. The cubic root of 139263641 is about 518.3374428070.

The spelling of 139263641 in words is "one hundred thirty-nine million, two hundred sixty-three thousand, six hundred forty-one".