61619413 has 16 divisors (see below), whose sum is σ = 67392000. Its totient is φ = 56125440.

The previous prime is 61619399. The next prime is 61619429. The reversal of 61619413 is 31491616.

It is a cyclic number.

It is not a de Polignac number, because 61619413 - 2²¹ = 59522261 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61619813) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 137013 + ... + 137461.

It is an arithmetic number, because the mean of its divisors is an integer number (4212000).

Almost surely, 2^61619413 is an apocalyptic number.

It is an amenable number.

61619413 is a deficient number, since it is larger than the sum of its proper divisors (5772587).

61619413 is a wasteful number, since it uses less digits than its factorization.

61619413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 732.

The product of its digits is 3888, while the sum is 31.

The square root of 61619413 is about 7849.8033733336. The cubic root of 61619413 is about 394.9776476162.

The spelling of 61619413 in words is "sixty-one million, six hundred nineteen thousand, four hundred thirteen".