1361406637 has 4 divisors (see below), whose sum is σ = 1362578400. Its totient is φ = 1360234876.

The previous prime is 1361406623. The next prime is 1361406659. The reversal of 1361406637 is 7366041631.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7366041631 = 13 ⋅566618587.

It is a cyclic number.

It is not a de Polignac number, because 1361406637 - 2¹¹ = 1361404589 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1361406596 and 1361406605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1361406037) 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, 584137 + ... + 586462.

It is an arithmetic number, because the mean of its divisors is an integer number (340644600).

Almost surely, 2^1361406637 is an apocalyptic number.

It is an amenable number.

1361406637 is a deficient number, since it is larger than the sum of its proper divisors (1171763).

1361406637 is a wasteful number, since it uses less digits than its factorization.

1361406637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1171762.

The product of its (nonzero) digits is 54432, while the sum is 37.

The square root of 1361406637 is about 36897.2443008960. The cubic root of 1361406637 is about 1108.3134946506.

The spelling of 1361406637 in words is "one billion, three hundred sixty-one million, four hundred six thousand, six hundred thirty-seven".