697871739371 has 2 divisors, whose sum is σ = 697871739372. Its totient is φ = 697871739370.

The previous prime is 697871739269. The next prime is 697871739403. The reversal of 697871739371 is 173937178796.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 697871739371 - 2¹⁸ = 697871477227 is a prime.

It is a super-2 number, since 2×697871739371² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (697871739671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 348935869685 + 348935869686.

It is an arithmetic number, because the mean of its divisors is an integer number (348935869686).

Almost surely, 2^697871739371 is an apocalyptic number.

697871739371 is a deficient number, since it is larger than the sum of its proper divisors (1).

697871739371 is an equidigital number, since it uses as much as digits as its factorization.

697871739371 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84015792, while the sum is 68.

The spelling of 697871739371 in words is "six hundred ninety-seven billion, eight hundred seventy-one million, seven hundred thirty-nine thousand, three hundred seventy-one".