83070191961 has 27 divisors (see below), whose sum is σ = 120862069237. Its totient is φ = 54980656440.

The previous prime is 83070191923. The next prime is 83070191987. The reversal of 83070191961 is 16919107038.

The square root of 83070191961 is 288219.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 83070191961 - 2¹³ = 83070183769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83070191921) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 165149236 + ... + 165149738.

Almost surely, 2^83070191961 is an apocalyptic number.

83070191961 is the 288219-th square number.

83070191961 is the 144110-th centered octagonal number.

It is an amenable number.

83070191961 is a deficient number, since it is larger than the sum of its proper divisors (37791877276).

83070191961 is an frugal number, since it uses more digits than its factorization.

83070191961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1394 (or 697 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 45.

Adding to 83070191961 its reverse (16919107038), we get a palindrome (99989298999).

The spelling of 83070191961 in words is "eighty-three billion, seventy million, one hundred ninety-one thousand, nine hundred sixty-one".