2987189397 has 6 divisors (see below), whose sum is σ = 4314829142. Its totient is φ = 1991459592.

The previous prime is 2987189393. The next prime is 2987189407. The reversal of 2987189397 is 7939817892.

It can be written as a sum of positive squares in only one way, i.e., 2157230916 + 829958481 = 46446^2 + 28809^2 .

It is not a de Polignac number, because 2987189397 - 2² = 2987189393 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2987189393) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 165954958 + ... + 165954975.

Almost surely, 2^2987189397 is an apocalyptic number.

It is an amenable number.

2987189397 is a deficient number, since it is larger than the sum of its proper divisors (1327639745).

2987189397 is a wasteful number, since it uses less digits than its factorization.

2987189397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331909939 (or 331909936 counting only the distinct ones).

The product of its digits is 13716864, while the sum is 63.

The square root of 2987189397 is about 54655.1863687244. The cubic root of 2987189397 is about 1440.1937427399.

The spelling of 2987189397 in words is "two billion, nine hundred eighty-seven million, one hundred eighty-nine thousand, three hundred ninety-seven".