61572007 has 4 divisors (see below), whose sum is σ = 70368016. Its totient is φ = 52776000.

The previous prime is 61571999. The next prime is 61572019. The reversal of 61572007 is 70027516.

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

It is a cyclic number.

It is not a de Polignac number, because 61572007 - 2³ = 61571999 is a prime.

It is a super-2 number, since 2×61572007² = 7582224092016098, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61570007) 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, 4397994 + ... + 4398007.

It is an arithmetic number, because the mean of its divisors is an integer number (17592004).

Almost surely, 2^61572007 is an apocalyptic number.

61572007 is a deficient number, since it is larger than the sum of its proper divisors (8796009).

61572007 is an equidigital number, since it uses as much as digits as its factorization.

61572007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8796008.

The product of its (nonzero) digits is 2940, while the sum is 28.

The square root of 61572007 is about 7846.7832262654. The cubic root of 61572007 is about 394.8763315251.

The spelling of 61572007 in words is "sixty-one million, five hundred seventy-two thousand, seven".