61321697 has 4 divisors (see below), whose sum is σ = 61639620. Its totient is φ = 61003776.

The previous prime is 61321661. The next prime is 61321717. The reversal of 61321697 is 79612316.

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 24245776 + 37075921 = 4924^2 + 6089^2 .

It is a cyclic number.

It is not a de Polignac number, because 61321697 - 2⁶ = 61321633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61321097) 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, 158672 + ... + 159057.

It is an arithmetic number, because the mean of its divisors is an integer number (15409905).

Almost surely, 2^61321697 is an apocalyptic number.

It is an amenable number.

61321697 is a deficient number, since it is larger than the sum of its proper divisors (317923).

61321697 is a wasteful number, since it uses less digits than its factorization.

61321697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317922.

The product of its digits is 13608, while the sum is 35.

The square root of 61321697 is about 7830.8171348845. The cubic root of 61321697 is about 394.3405050270.

The spelling of 61321697 in words is "sixty-one million, three hundred twenty-one thousand, six hundred ninety-seven".