61237091 has 4 divisors (see below), whose sum is σ = 61285392. Its totient is φ = 61188792.

The previous prime is 61237081. The next prime is 61237123. The reversal of 61237091 is 19073216.

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 61237091 - 2⁶ = 61237027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61237021) 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, 22196 + ... + 24801.

It is an arithmetic number, because the mean of its divisors is an integer number (15321348).

Almost surely, 2^61237091 is an apocalyptic number.

61237091 is a deficient number, since it is larger than the sum of its proper divisors (48301).

61237091 is a wasteful number, since it uses less digits than its factorization.

61237091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48300.

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 61237091 is about 7825.4131520323. The cubic root of 61237091 is about 394.1590633831.

The spelling of 61237091 in words is "sixty-one million, two hundred thirty-seven thousand, ninety-one".