61622997 has 4 divisors (see below), whose sum is σ = 82164000. Its totient is φ = 41081996.

The previous prime is 61622989. The next prime is 61623013. The reversal of 61622997 is 79922616.

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 61622997 - 2³ = 61622989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61622917) 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, 10270497 + ... + 10270502.

It is an arithmetic number, because the mean of its divisors is an integer number (20541000).

Almost surely, 2^61622997 is an apocalyptic number.

It is an amenable number.

61622997 is a deficient number, since it is larger than the sum of its proper divisors (20541003).

61622997 is a wasteful number, since it uses less digits than its factorization.

61622997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20541002.

The product of its digits is 81648, while the sum is 42.

The square root of 61622997 is about 7850.0316559871. The cubic root of 61622997 is about 394.9853052270.

The spelling of 61622997 in words is "sixty-one million, six hundred twenty-two thousand, nine hundred ninety-seven".