1387497061 has 2 divisors, whose sum is σ = 1387497062. Its totient is φ = 1387497060.

The previous prime is 1387497047. The next prime is 1387497071. The reversal of 1387497061 is 1607947831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1384956225 + 2540836 = 37215^2 + 1594^2 .

It is a cyclic number.

It is not a de Polignac number, because 1387497061 - 2⁵ = 1387497029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1387497071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 693748530 + 693748531.

It is an arithmetic number, because the mean of its divisors is an integer number (693748531).

Almost surely, 2^1387497061 is an apocalyptic number.

It is an amenable number.

1387497061 is a deficient number, since it is larger than the sum of its proper divisors (1).

1387497061 is an equidigital number, since it uses as much as digits as its factorization.

1387497061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 254016, while the sum is 46.

The square root of 1387497061 is about 37249.1216138045. The cubic root of 1387497061 is about 1115.3487647268.

The spelling of 1387497061 in words is "one billion, three hundred eighty-seven million, four hundred ninety-seven thousand, sixty-one".