61919707 has 2 divisors, whose sum is σ = 61919708. Its totient is φ = 61919706.

The previous prime is 61919681. The next prime is 61919713. The reversal of 61919707 is 70791916.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61919707 - 2⁷ = 61919579 is a prime.

It is a super-2 number, since 2×61919707² = 7668100229931698, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61919707.

It is not a weakly prime, because it can be changed into another prime (61919747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30959853 + 30959854.

It is an arithmetic number, because the mean of its divisors is an integer number (30959854).

Almost surely, 2^61919707 is an apocalyptic number.

61919707 is a deficient number, since it is larger than the sum of its proper divisors (1).

61919707 is an equidigital number, since it uses as much as digits as its factorization.

61919707 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23814, while the sum is 40.

The square root of 61919707 is about 7868.9076116066. The cubic root of 61919707 is about 395.6182317881.

It can be divided in two parts, 61919 and 707, that added together give a palindrome (62626).

The spelling of 61919707 in words is "sixty-one million, nine hundred nineteen thousand, seven hundred seven".