1970691287 has 4 divisors (see below), whose sum is σ = 1973295336. Its totient is φ = 1968087240.

The previous prime is 1970691271. The next prime is 1970691319. The reversal of 1970691287 is 7821960791.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7821960791 = 1873 ⋅4176167.

It is a cyclic number.

It is not a de Polignac number, because 1970691287 - 2⁴ = 1970691271 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 (1970691787) 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, 1300889 + ... + 1302402.

It is an arithmetic number, because the mean of its divisors is an integer number (493323834).

Almost surely, 2^1970691287 is an apocalyptic number.

1970691287 is a deficient number, since it is larger than the sum of its proper divisors (2604049).

1970691287 is an equidigital number, since it uses as much as digits as its factorization.

1970691287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2604048.

The product of its (nonzero) digits is 381024, while the sum is 50.

The square root of 1970691287 is about 44392.4688094726. The cubic root of 1970691287 is about 1253.7362955096.

The spelling of 1970691287 in words is "one billion, nine hundred seventy million, six hundred ninety-one thousand, two hundred eighty-seven".