61172390 has 8 divisors (see below), whose sum is σ = 110110320. Its totient is φ = 24468952.

The previous prime is 61172383. The next prime is 61172399. The reversal of 61172390 is 9327116.

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

It is a super-2 number, since 2×61172390² = 7484122596624200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61172399) 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, 3058610 + ... + 3058629.

It is an arithmetic number, because the mean of its divisors is an integer number (13763790).

Almost surely, 2^61172390 is an apocalyptic number.

61172390 is a deficient number, since it is larger than the sum of its proper divisors (48937930).

61172390 is a wasteful number, since it uses less digits than its factorization.

61172390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6117246.

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

The square root of 61172390 is about 7821.2780285577. The cubic root of 61172390 is about 394.0201961699.

The spelling of 61172390 in words is "sixty-one million, one hundred seventy-two thousand, three hundred ninety".