61900291 has 4 divisors (see below), whose sum is σ = 64591632. Its totient is φ = 59208952.

The previous prime is 61900261. The next prime is 61900327. The reversal of 61900291 is 19200916.

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

It is a cyclic number.

It is not a de Polignac number, because 61900291 - 2¹³ = 61892099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61900261) 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, 1345636 + ... + 1345681.

It is an arithmetic number, because the mean of its divisors is an integer number (16147908).

Almost surely, 2^61900291 is an apocalyptic number.

61900291 is a deficient number, since it is larger than the sum of its proper divisors (2691341).

61900291 is a wasteful number, since it uses less digits than its factorization.

61900291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2691340.

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

The square root of 61900291 is about 7867.6737985252. The cubic root of 61900291 is about 395.5768764751.

The spelling of 61900291 in words is "sixty-one million, nine hundred thousand, two hundred ninety-one".