61629389 has 2 divisors, whose sum is σ = 61629390. Its totient is φ = 61629388.

The previous prime is 61629377. The next prime is 61629413. The reversal of 61629389 is 98392616.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61622500 + 6889 = 7850^2 + 83^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61629389 is a prime.

It is a super-3 number, since 3×61629389³ (a number of 24 digits) contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61629319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30814694 + 30814695.

It is an arithmetic number, because the mean of its divisors is an integer number (30814695).

Almost surely, 2^61629389 is an apocalyptic number.

It is an amenable number.

61629389 is a deficient number, since it is larger than the sum of its proper divisors (1).

61629389 is an equidigital number, since it uses as much as digits as its factorization.

61629389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 139968, while the sum is 44.

The square root of 61629389 is about 7850.4387775461. The cubic root of 61629389 is about 394.9989617021.

It can be divided in two parts, 6162 and 9389, that added together give a palindrome (15551).

The spelling of 61629389 in words is "sixty-one million, six hundred twenty-nine thousand, three hundred eighty-nine".