61429631 has 8 divisors (see below), whose sum is σ = 63504384. Its totient is φ = 59360760.

The previous prime is 61429609. The next prime is 61429637. The reversal of 61429631 is 13692416.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61429631 is a prime.

It is a super-2 number, since 2×61429631² = 7547199129592322, 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 (61429637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32786 + ... + 34608.

It is an arithmetic number, because the mean of its divisors is an integer number (7938048).

Almost surely, 2^61429631 is an apocalyptic number.

61429631 is a deficient number, since it is larger than the sum of its proper divisors (2074753).

61429631 is a wasteful number, since it uses less digits than its factorization.

61429631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2941.

The product of its digits is 7776, while the sum is 32.

The square root of 61429631 is about 7837.7057229779. The cubic root of 61429631 is about 394.5717325945.

The spelling of 61429631 in words is "sixty-one million, four hundred twenty-nine thousand, six hundred thirty-one".