697696541 has 4 divisors (see below), whose sum is σ = 738737532. Its totient is φ = 656655552.

The previous prime is 697696501. The next prime is 697696577. The reversal of 697696541 is 145696796.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 410224516 + 287472025 = 20254^2 + 16955^2 .

It is a cyclic number.

It is not a de Polignac number, because 697696541 - 2⁶ = 697696477 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 (697696501) 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, 20520470 + ... + 20520503.

It is an arithmetic number, because the mean of its divisors is an integer number (184684383).

Almost surely, 2^697696541 is an apocalyptic number.

It is an amenable number.

697696541 is a deficient number, since it is larger than the sum of its proper divisors (41040991).

697696541 is a wasteful number, since it uses less digits than its factorization.

697696541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41040990.

The product of its digits is 2449440, while the sum is 53.

The square root of 697696541 is about 26413.9459566343. The cubic root of 697696541 is about 886.9290027049.

The spelling of 697696541 in words is "six hundred ninety-seven million, six hundred ninety-six thousand, five hundred forty-one".