61502197 has 4 divisors (see below), whose sum is σ = 61528960. Its totient is φ = 61475436.

The previous prime is 61502159. The next prime is 61502201. The reversal of 61502197 is 79120516.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61502197 - 2¹¹ = 61500149 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 (61502137) 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, 9573 + ... + 14650.

It is an arithmetic number, because the mean of its divisors is an integer number (15382240).

Almost surely, 2^61502197 is an apocalyptic number.

It is an amenable number.

61502197 is a deficient number, since it is larger than the sum of its proper divisors (26763).

61502197 is a wasteful number, since it uses less digits than its factorization.

61502197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26762.

The product of its (nonzero) digits is 3780, while the sum is 31.

The square root of 61502197 is about 7842.3336450319. Note that the first 3 decimals coincide. The cubic root of 61502197 is about 394.7270388904.

The spelling of 61502197 in words is "sixty-one million, five hundred two thousand, one hundred ninety-seven".