1397503669 has 2 divisors, whose sum is σ = 1397503670. Its totient is φ = 1397503668.

The previous prime is 1397503661. The next prime is 1397503673. The reversal of 1397503669 is 9663057931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1358291025 + 39212644 = 36855^2 + 6262^2 .

It is a cyclic number.

It is not a de Polignac number, because 1397503669 - 2³ = 1397503661 is a prime.

It is a super-2 number, since 2×1397503669² = 3906033009736923122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1397503661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 698751834 + 698751835.

It is an arithmetic number, because the mean of its divisors is an integer number (698751835).

Almost surely, 2^1397503669 is an apocalyptic number.

It is an amenable number.

1397503669 is a deficient number, since it is larger than the sum of its proper divisors (1).

1397503669 is an equidigital number, since it uses as much as digits as its factorization.

1397503669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 918540, while the sum is 49.

The square root of 1397503669 is about 37383.2003579148. The cubic root of 1397503669 is about 1118.0236374708.

The spelling of 1397503669 in words is "one billion, three hundred ninety-seven million, five hundred three thousand, six hundred sixty-nine".