1901297689 has 8 divisors (see below), whose sum is σ = 1915080480. Its totient is φ = 1887541056.

The previous prime is 1901297687. The next prime is 1901297693. The reversal of 1901297689 is 9867921091.

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 1901297689 - 2¹ = 1901297687 is a prime.

It is a super-2 number, since 2×1901297689² = 7229865804393481442, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1901297687) 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, 153282 + ... + 165220.

It is an arithmetic number, because the mean of its divisors is an integer number (239385060).

Almost surely, 2^1901297689 is an apocalyptic number.

It is an amenable number.

1901297689 is a deficient number, since it is larger than the sum of its proper divisors (13782791).

1901297689 is a wasteful number, since it uses less digits than its factorization.

1901297689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13079.

The product of its (nonzero) digits is 489888, while the sum is 52.

The square root of 1901297689 is about 43603.8724083080. The cubic root of 1901297689 is about 1238.8442424251.

The spelling of 1901297689 in words is "one billion, nine hundred one million, two hundred ninety-seven thousand, six hundred eighty-nine".