1201109977 has 2 divisors, whose sum is σ = 1201109978. Its totient is φ = 1201109976.

The previous prime is 1201109951. The next prime is 1201109983. The reversal of 1201109977 is 7799011021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 806332816 + 394777161 = 28396^2 + 19869^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1201109977 is a prime.

It is not a weakly prime, because it can be changed into another prime (1201101977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600554988 + 600554989.

It is an arithmetic number, because the mean of its divisors is an integer number (600554989).

Almost surely, 2^1201109977 is an apocalyptic number.

It is an amenable number.

1201109977 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201109977 is an equidigital number, since it uses as much as digits as its factorization.

1201109977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7938, while the sum is 37.

The square root of 1201109977 is about 34657.0335862722. The cubic root of 1201109977 is about 1062.9861144819.

The spelling of 1201109977 in words is "one billion, two hundred one million, one hundred nine thousand, nine hundred seventy-seven".