1361997971 has 8 divisors (see below), whose sum is σ = 1380103920. Its totient is φ = 1343991808.

The previous prime is 1361997941. The next prime is 1361997991. The reversal of 1361997971 is 1797991631.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1361997971 - 2⁶ = 1361997907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1361997941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2735 + ... + 52263.

It is an arithmetic number, because the mean of its divisors is an integer number (172512990).

Almost surely, 2^1361997971 is an apocalyptic number.

1361997971 is a deficient number, since it is larger than the sum of its proper divisors (18105949).

1361997971 is a wasteful number, since it uses less digits than its factorization.

1361997971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49893.

The product of its digits is 642978, while the sum is 53.

The square root of 1361997971 is about 36905.2566851932. The cubic root of 1361997971 is about 1108.4739386520.

The spelling of 1361997971 in words is "one billion, three hundred sixty-one million, nine hundred ninety-seven thousand, nine hundred seventy-one".