139782997 has 2 divisors, whose sum is σ = 139782998. Its totient is φ = 139782996.

The previous prime is 139782989. The next prime is 139783001. The reversal of 139782997 is 799287931.

139782997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 111809476 + 27973521 = 10574^2 + 5289^2 .

It is a cyclic number.

It is not a de Polignac number, because 139782997 - 2³ = 139782989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139782967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69891498 + 69891499.

It is an arithmetic number, because the mean of its divisors is an integer number (69891499).

Almost surely, 2^139782997 is an apocalyptic number.

It is an amenable number.

139782997 is a deficient number, since it is larger than the sum of its proper divisors (1).

139782997 is an equidigital number, since it uses as much as digits as its factorization.

139782997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1714608, while the sum is 55.

The square root of 139782997 is about 11822.9859595620. The cubic root of 139782997 is about 518.9809888802.

The spelling of 139782997 in words is "one hundred thirty-nine million, seven hundred eighty-two thousand, nine hundred ninety-seven".