61873457 has 2 divisors, whose sum is σ = 61873458. Its totient is φ = 61873456.

The previous prime is 61873451. The next prime is 61873529. The reversal of 61873457 is 75437816.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57138481 + 4734976 = 7559^2 + 2176^2 .

It is a cyclic number.

It is not a de Polignac number, because 61873457 - 2⁶ = 61873393 is a prime.

It is a super-2 number, since 2×61873457² = 7656649362261698, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61873451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30936728 + 30936729.

It is an arithmetic number, because the mean of its divisors is an integer number (30936729).

Almost surely, 2^61873457 is an apocalyptic number.

It is an amenable number.

61873457 is a deficient number, since it is larger than the sum of its proper divisors (1).

61873457 is an equidigital number, since it uses as much as digits as its factorization.

61873457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 141120, while the sum is 41.

The square root of 61873457 is about 7865.9682811463. The cubic root of 61873457 is about 395.5197068777.

The spelling of 61873457 in words is "sixty-one million, eight hundred seventy-three thousand, four hundred fifty-seven".