120897631 has 4 divisors (see below), whose sum is σ = 121017064. Its totient is φ = 120778200.

The previous prime is 120897629. The next prime is 120897649. The reversal of 120897631 is 136798021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 120897631 - 2¹ = 120897629 is a prime.

It is a super-2 number, since 2×120897631² = 29232474362824322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120897331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58185 + ... + 60226.

It is an arithmetic number, because the mean of its divisors is an integer number (30254266).

Almost surely, 2^120897631 is an apocalyptic number.

120897631 is a deficient number, since it is larger than the sum of its proper divisors (119433).

120897631 is a wasteful number, since it uses less digits than its factorization.

120897631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119432.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 120897631 is about 10995.3458790526. The cubic root of 120897631 is about 494.4692212172.

The spelling of 120897631 in words is "one hundred twenty million, eight hundred ninety-seven thousand, six hundred thirty-one".