61513069 has 4 divisors (see below), whose sum is σ = 61528896. Its totient is φ = 61497244.

The previous prime is 61513061. The next prime is 61513097. The reversal of 61513069 is 96031516.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 61513069 - 2³ = 61513061 is a prime.

It is a super-2 number, since 2×61513069² = 7567715315597522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61513069.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61513061) 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, 2382 + ... + 11344.

It is an arithmetic number, because the mean of its divisors is an integer number (15382224).

Almost surely, 2^61513069 is an apocalyptic number.

It is an amenable number.

61513069 is a deficient number, since it is larger than the sum of its proper divisors (15827).

61513069 is an equidigital number, since it uses as much as digits as its factorization.

61513069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15826.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 61513069 is about 7843.0267754229. The cubic root of 61513069 is about 394.7502967019.

The spelling of 61513069 in words is "sixty-one million, five hundred thirteen thousand, sixty-nine".