1361490769 has 4 divisors (see below), whose sum is σ = 1373981620. Its totient is φ = 1348999920.

The previous prime is 1361490763. The next prime is 1361490787. The reversal of 1361490769 is 9670941631.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9670941631 = 13 ⋅743918587.

It can be written as a sum of positive squares in 2 ways, for example, as 436601025 + 924889744 = 20895^2 + 30412^2 .

It is a cyclic number.

It is not a de Polignac number, because 1361490769 - 2⁵ = 1361490737 is a prime.

It is a super-2 number, since 2×1361490769² = 3707314228144422722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1361490763) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6245262 + ... + 6245479.

It is an arithmetic number, because the mean of its divisors is an integer number (343495405).

Almost surely, 2^1361490769 is an apocalyptic number.

It is an amenable number.

1361490769 is a deficient number, since it is larger than the sum of its proper divisors (12490851).

1361490769 is a wasteful number, since it uses less digits than its factorization.

1361490769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12490850.

The product of its (nonzero) digits is 244944, while the sum is 46.

The square root of 1361490769 is about 36898.3843684246. The cubic root of 1361490769 is about 1108.3363246432.

The spelling of 1361490769 in words is "one billion, three hundred sixty-one million, four hundred ninety thousand, seven hundred sixty-nine".