693697541 has 2 divisors, whose sum is σ = 693697542. Its totient is φ = 693697540.

The previous prime is 693697513. The next prime is 693697547. The reversal of 693697541 is 145796396.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 692795041 + 902500 = 26321^2 + 950^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-693697541 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 693697541.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (693697547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 346848770 + 346848771.

It is an arithmetic number, because the mean of its divisors is an integer number (346848771).

Almost surely, 2^693697541 is an apocalyptic number.

It is an amenable number.

693697541 is a deficient number, since it is larger than the sum of its proper divisors (1).

693697541 is an equidigital number, since it uses as much as digits as its factorization.

693697541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1224720, while the sum is 50.

The square root of 693697541 is about 26338.1385257197. The cubic root of 693697541 is about 885.2312124245.

The spelling of 693697541 in words is "six hundred ninety-three million, six hundred ninety-seven thousand, five hundred forty-one".