120691481 has 2 divisors, whose sum is σ = 120691482. Its totient is φ = 120691480.

The previous prime is 120691469. The next prime is 120691499. The reversal of 120691481 is 184196021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116985856 + 3705625 = 10816^2 + 1925^2 .

It is an emirp because it is prime and its reverse (184196021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 120691481 - 2¹⁴ = 120675097 is a prime.

It is a super-3 number, since 3×120691481³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (120691421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60345740 + 60345741.

It is an arithmetic number, because the mean of its divisors is an integer number (60345741).

Almost surely, 2^120691481 is an apocalyptic number.

It is an amenable number.

120691481 is a deficient number, since it is larger than the sum of its proper divisors (1).

120691481 is an equidigital number, since it uses as much as digits as its factorization.

120691481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 120691481 is about 10985.9674585355. The cubic root of 120691481 is about 494.1880113415.

The spelling of 120691481 in words is "one hundred twenty million, six hundred ninety-one thousand, four hundred eighty-one".