61621834 has 8 divisors (see below), whose sum is σ = 93948228. Its totient is φ = 30305760.

The previous prime is 61621829. The next prime is 61621837. The reversal of 61621834 is 43812616.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 37149025 + 24472809 = 6095^2 + 4947^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 61621796 and 61621805.

It is not an unprimeable number, because it can be changed into a prime (61621837) 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, 252427 + ... + 252670.

Almost surely, 2^61621834 is an apocalyptic number.

61621834 is a deficient number, since it is larger than the sum of its proper divisors (32326394).

61621834 is a wasteful number, since it uses less digits than its factorization.

61621834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505160.

The product of its digits is 6912, while the sum is 31.

The square root of 61621834 is about 7849.9575795032. The cubic root of 61621834 is about 394.9828203819.

The spelling of 61621834 in words is "sixty-one million, six hundred twenty-one thousand, eight hundred thirty-four".