83694961997 has 2 divisors, whose sum is σ = 83694961998. Its totient is φ = 83694961996.

The previous prime is 83694961927. The next prime is 83694962051. The reversal of 83694961997 is 79916949638.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48588944041 + 35106017956 = 220429^2 + 187366^2 .

It is a cyclic number.

It is not a de Polignac number, because 83694961997 - 2²⁸ = 83426526541 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 83694961997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83694961927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41847480998 + 41847480999.

It is an arithmetic number, because the mean of its divisors is an integer number (41847480999).

Almost surely, 2^83694961997 is an apocalyptic number.

It is an amenable number.

83694961997 is a deficient number, since it is larger than the sum of its proper divisors (1).

83694961997 is an equidigital number, since it uses as much as digits as its factorization.

83694961997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 158723712, while the sum is 71.

The spelling of 83694961997 in words is "eighty-three billion, six hundred ninety-four million, nine hundred sixty-one thousand, nine hundred ninety-seven".