61901029 has 4 divisors (see below), whose sum is σ = 65542284. Its totient is φ = 58259776.

The previous prime is 61901023. The next prime is 61901033. The reversal of 61901029 is 92010916.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 28376929 + 33524100 = 5327^2 + 5790^2 .

It is a cyclic number.

It is not a de Polignac number, because 61901029 - 2¹³ = 61892837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61900988 and 61901006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61901023) 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, 1820602 + ... + 1820635.

It is an arithmetic number, because the mean of its divisors is an integer number (16385571).

Almost surely, 2^61901029 is an apocalyptic number.

It is an amenable number.

61901029 is a deficient number, since it is larger than the sum of its proper divisors (3641255).

61901029 is a wasteful number, since it uses less digits than its factorization.

61901029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3641254.

The product of its (nonzero) digits is 972, while the sum is 28.

The square root of 61901029 is about 7867.7206991606. The cubic root of 61901029 is about 395.5784485440.

The spelling of 61901029 in words is "sixty-one million, nine hundred one thousand, twenty-nine".