61627421 has 2 divisors, whose sum is σ = 61627422. Its totient is φ = 61627420.

The previous prime is 61627351. The next prime is 61627429. The reversal of 61627421 is 12472616.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46308025 + 15319396 = 6805^2 + 3914^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61627421 is a prime.

It is a super-2 number, since 2×61627421² = 7595878038222482, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61627429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30813710 + 30813711.

It is an arithmetic number, because the mean of its divisors is an integer number (30813711).

Almost surely, 2^61627421 is an apocalyptic number.

It is an amenable number.

61627421 is a deficient number, since it is larger than the sum of its proper divisors (1).

61627421 is an equidigital number, since it uses as much as digits as its factorization.

61627421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 29.

The square root of 61627421 is about 7850.3134332331. The cubic root of 61627421 is about 394.9947571809.

The spelling of 61627421 in words is "sixty-one million, six hundred twenty-seven thousand, four hundred twenty-one".