139794577 has 4 divisors (see below), whose sum is σ = 150548020. Its totient is φ = 129041136.

The previous prime is 139794569. The next prime is 139794601. The reversal of 139794577 is 775497931.

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 80442961 + 59351616 = 8969^2 + 7704^2 .

It is a cyclic number.

It is not a de Polignac number, because 139794577 - 2³ = 139794569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139794377) 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, 5376702 + ... + 5376727.

It is an arithmetic number, because the mean of its divisors is an integer number (37637005).

Almost surely, 2^139794577 is an apocalyptic number.

It is an amenable number.

139794577 is a deficient number, since it is larger than the sum of its proper divisors (10753443).

139794577 is a wasteful number, since it uses less digits than its factorization.

139794577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10753442.

The product of its digits is 1666980, while the sum is 52.

The square root of 139794577 is about 11823.4756734219. The cubic root of 139794577 is about 518.9953197455.

The spelling of 139794577 in words is "one hundred thirty-nine million, seven hundred ninety-four thousand, five hundred seventy-seven".