1367911561 has 2 divisors, whose sum is σ = 1367911562. Its totient is φ = 1367911560.

The previous prime is 1367911553. The next prime is 1367911603. The reversal of 1367911561 is 1651197631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1310440000 + 57471561 = 36200^2 + 7581^2 .

It is a cyclic number.

It is not a de Polignac number, because 1367911561 - 2³ = 1367911553 is a prime.

It is not a weakly prime, because it can be changed into another prime (1367911261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 683955780 + 683955781.

It is an arithmetic number, because the mean of its divisors is an integer number (683955781).

Almost surely, 2^1367911561 is an apocalyptic number.

It is an amenable number.

1367911561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1367911561 is an equidigital number, since it uses as much as digits as its factorization.

1367911561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34020, while the sum is 40.

The square root of 1367911561 is about 36985.2884401352. The cubic root of 1367911561 is about 1110.0758980107.

The spelling of 1367911561 in words is "one billion, three hundred sixty-seven million, nine hundred eleven thousand, five hundred sixty-one".