120861997 has 2 divisors, whose sum is σ = 120861998. Its totient is φ = 120861996.

The previous prime is 120861989. The next prime is 120862003. The reversal of 120861997 is 799168021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 104264521 + 16597476 = 10211^2 + 4074^2 .

It is a cyclic number.

It is not a de Polignac number, because 120861997 - 2³ = 120861989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120861947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60430998 + 60430999.

It is an arithmetic number, because the mean of its divisors is an integer number (60430999).

Almost surely, 2^120861997 is an apocalyptic number.

It is an amenable number.

120861997 is a deficient number, since it is larger than the sum of its proper divisors (1).

120861997 is an equidigital number, since it uses as much as digits as its factorization.

120861997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 43.

The square root of 120861997 is about 10993.7253467603. The cubic root of 120861997 is about 494.4206356288.

The spelling of 120861997 in words is "one hundred twenty million, eight hundred sixty-one thousand, nine hundred ninety-seven".