61243654 has 4 divisors (see below), whose sum is σ = 91865484. Its totient is φ = 30621826.

The previous prime is 61243607. The next prime is 61243657. The reversal of 61243654 is 45634216.

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

It is a super-3 number, since 3×61243654³ (a number of 24 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61243657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15310912 + ... + 15310915.

It is an arithmetic number, because the mean of its divisors is an integer number (22966371).

Almost surely, 2^61243654 is an apocalyptic number.

61243654 is a deficient number, since it is larger than the sum of its proper divisors (30621830).

61243654 is a wasteful number, since it uses less digits than its factorization.

61243654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30621829.

The product of its digits is 17280, while the sum is 31.

The square root of 61243654 is about 7825.8324796791. The cubic root of 61243654 is about 394.1731440297.

The spelling of 61243654 in words is "sixty-one million, two hundred forty-three thousand, six hundred fifty-four".