1138737247 has 2 divisors, whose sum is σ = 1138737248. Its totient is φ = 1138737246.

The previous prime is 1138737221. The next prime is 1138737253. The reversal of 1138737247 is 7427378311.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1138737247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1138737647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 569368623 + 569368624.

It is an arithmetic number, because the mean of its divisors is an integer number (569368624).

Almost surely, 2^1138737247 is an apocalyptic number.

1138737247 is a deficient number, since it is larger than the sum of its proper divisors (1).

1138737247 is an equidigital number, since it uses as much as digits as its factorization.

1138737247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 197568, while the sum is 43.

The square root of 1138737247 is about 33745.1810930094. The cubic root of 1138737247 is about 1044.2580745976.

The spelling of 1138737247 in words is "one billion, one hundred thirty-eight million, seven hundred thirty-seven thousand, two hundred forty-seven".