61574407 has 4 divisors (see below), whose sum is σ = 62493496. Its totient is φ = 60655320.

The previous prime is 61574377. The next prime is 61574411. The reversal of 61574407 is 70447516.

It is a happy number.

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 61574407 - 2¹¹ = 61572359 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 (61574477) 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, 459444 + ... + 459577.

It is an arithmetic number, because the mean of its divisors is an integer number (15623374).

Almost surely, 2^61574407 is an apocalyptic number.

61574407 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

61574407 is a deficient number, since it is larger than the sum of its proper divisors (919089).

61574407 is an equidigital number, since it uses as much as digits as its factorization.

61574407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 919088.

The product of its (nonzero) digits is 23520, while the sum is 34.

The square root of 61574407 is about 7846.9361536844. The cubic root of 61574407 is about 394.8814620540.

The spelling of 61574407 in words is "sixty-one million, five hundred seventy-four thousand, four hundred seven".