139776461 has 4 divisors (see below), whose sum is σ = 152483424. Its totient is φ = 127069500.

The previous prime is 139776443. The next prime is 139776463. The reversal of 139776461 is 164677931.

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 a de Polignac number, because none of the positive numbers 2^k-139776461 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 (139776463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6353465 + ... + 6353486.

It is an arithmetic number, because the mean of its divisors is an integer number (38120856).

Almost surely, 2^139776461 is an apocalyptic number.

139776461 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

139776461 is a deficient number, since it is larger than the sum of its proper divisors (12706963).

139776461 is a wasteful number, since it uses less digits than its factorization.

139776461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12706962.

The product of its digits is 190512, while the sum is 44.

The square root of 139776461 is about 11822.7095456160. The cubic root of 139776461 is about 518.9728998835.

The spelling of 139776461 in words is "one hundred thirty-nine million, seven hundred seventy-six thousand, four hundred sixty-one".