61621435 has 4 divisors (see below), whose sum is σ = 73945728. Its totient is φ = 49297144.

The previous prime is 61621421. The next prime is 61621471. The reversal of 61621435 is 53412616.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61621435 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6162139 + ... + 6162148.

It is an arithmetic number, because the mean of its divisors is an integer number (18486432).

Almost surely, 2^61621435 is an apocalyptic number.

61621435 is a deficient number, since it is larger than the sum of its proper divisors (12324293).

61621435 is a wasteful number, since it uses less digits than its factorization.

61621435 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12324292.

The product of its digits is 4320, while the sum is 28.

The square root of 61621435 is about 7849.9321653120. The cubic root of 61621435 is about 394.9819678784.

The spelling of 61621435 in words is "sixty-one million, six hundred twenty-one thousand, four hundred thirty-five".