139842797 has 2 divisors, whose sum is σ = 139842798. Its totient is φ = 139842796.

The previous prime is 139842713. The next prime is 139842809. The reversal of 139842797 is 797248931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 104571076 + 35271721 = 10226^2 + 5939^2 .

It is a cyclic number.

It is not a de Polignac number, because 139842797 - 2⁸ = 139842541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139842707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69921398 + 69921399.

It is an arithmetic number, because the mean of its divisors is an integer number (69921399).

Almost surely, 2^139842797 is an apocalyptic number.

It is an amenable number.

139842797 is a deficient number, since it is larger than the sum of its proper divisors (1).

139842797 is an equidigital number, since it uses as much as digits as its factorization.

139842797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 762048, while the sum is 50.

The square root of 139842797 is about 11825.5146611046. The cubic root of 139842797 is about 519.0549860501.

The spelling of 139842797 in words is "one hundred thirty-nine million, eight hundred forty-two thousand, seven hundred ninety-seven".