1395018749 has 2 divisors, whose sum is σ = 1395018750. Its totient is φ = 1395018748.

The previous prime is 1395018719. The next prime is 1395018761. The reversal of 1395018749 is 9478105931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 786409849 + 608608900 = 28043^2 + 24670^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1395018749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1395018719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 697509374 + 697509375.

It is an arithmetic number, because the mean of its divisors is an integer number (697509375).

Almost surely, 2^1395018749 is an apocalyptic number.

It is an amenable number.

1395018749 is a deficient number, since it is larger than the sum of its proper divisors (1).

1395018749 is an equidigital number, since it uses as much as digits as its factorization.

1395018749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 272160, while the sum is 47.

The square root of 1395018749 is about 37349.9497857762. The cubic root of 1395018749 is about 1117.3605867185.

The spelling of 1395018749 in words is "one billion, three hundred ninety-five million, eighteen thousand, seven hundred forty-nine".