1201918397 has 8 divisors (see below), whose sum is σ = 1299372000. Its totient is φ = 1107884304.

The previous prime is 1201918387. The next prime is 1201918447. The reversal of 1201918397 is 7938191021.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1201918397 - 2⁸ = 1201918141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201918387) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 854147 + ... + 855552.

It is an arithmetic number, because the mean of its divisors is an integer number (162421500).

Almost surely, 2^1201918397 is an apocalyptic number.

It is an amenable number.

1201918397 is a deficient number, since it is larger than the sum of its proper divisors (97453603).

1201918397 is a wasteful number, since it uses less digits than its factorization.

1201918397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1709755.

The product of its (nonzero) digits is 27216, while the sum is 41.

The square root of 1201918397 is about 34668.6947692006. The cubic root of 1201918397 is about 1063.2245457462.

The spelling of 1201918397 in words is "one billion, two hundred one million, nine hundred eighteen thousand, three hundred ninety-seven".